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Theorem ftc1anc 32663
 Description: ftc1a 23604 holds for functions that obey the triangle inequality in the absence of ax-cc 9140. Theorem 565Ma of [Fremlin5] p. 220. (Contributed by Brendan Leahy, 11-May-2018.)
Hypotheses
Ref Expression
ftc1anc.g 𝐺 = (𝑥 ∈ (𝐴[,]𝐵) ↦ ∫(𝐴(,)𝑥)(𝐹𝑡) d𝑡)
ftc1anc.a (𝜑𝐴 ∈ ℝ)
ftc1anc.b (𝜑𝐵 ∈ ℝ)
ftc1anc.le (𝜑𝐴𝐵)
ftc1anc.s (𝜑 → (𝐴(,)𝐵) ⊆ 𝐷)
ftc1anc.d (𝜑𝐷 ⊆ ℝ)
ftc1anc.i (𝜑𝐹 ∈ 𝐿1)
ftc1anc.f (𝜑𝐹:𝐷⟶ℂ)
ftc1anc.t (𝜑 → ∀𝑠 ∈ ((,) “ ((𝐴[,]𝐵) × (𝐴[,]𝐵)))(abs‘∫𝑠(𝐹𝑡) d𝑡) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝑠, (abs‘(𝐹𝑡)), 0))))
Assertion
Ref Expression
ftc1anc (𝜑𝐺 ∈ ((𝐴[,]𝐵)–cn→ℂ))
Distinct variable groups:   𝑡,𝑠,𝑥,𝐴   𝐵,𝑠,𝑡,𝑥   𝐷,𝑠,𝑡,𝑥   𝐹,𝑠,𝑡,𝑥   𝜑,𝑠,𝑡,𝑥   𝐺,𝑠
Allowed substitution hints:   𝐺(𝑥,𝑡)

Proof of Theorem ftc1anc
Dummy variables 𝑎 𝑏 𝑓 𝑔 𝑟 𝑢 𝑤 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 ftc1anc.g . . 3 𝐺 = (𝑥 ∈ (𝐴[,]𝐵) ↦ ∫(𝐴(,)𝑥)(𝐹𝑡) d𝑡)
2 ftc1anc.a . . 3 (𝜑𝐴 ∈ ℝ)
3 ftc1anc.b . . 3 (𝜑𝐵 ∈ ℝ)
4 ftc1anc.le . . 3 (𝜑𝐴𝐵)
5 ftc1anc.s . . 3 (𝜑 → (𝐴(,)𝐵) ⊆ 𝐷)
6 ftc1anc.d . . 3 (𝜑𝐷 ⊆ ℝ)
7 ftc1anc.i . . 3 (𝜑𝐹 ∈ 𝐿1)
8 ftc1anc.f . . 3 (𝜑𝐹:𝐷⟶ℂ)
91, 2, 3, 4, 5, 6, 7, 8ftc1lem2 23603 . 2 (𝜑𝐺:(𝐴[,]𝐵)⟶ℂ)
10 rphalfcl 11734 . . . . . 6 (𝑦 ∈ ℝ+ → (𝑦 / 2) ∈ ℝ+)
111, 2, 3, 4, 5, 6, 7, 8ftc1anclem6 32660 . . . . . 6 ((𝜑 ∧ (𝑦 / 2) ∈ ℝ+) → ∃𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1(∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2))
1210, 11sylan2 490 . . . . 5 ((𝜑𝑦 ∈ ℝ+) → ∃𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1(∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2))
1312adantrl 748 . . . 4 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) → ∃𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1(∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2))
1410ad2antll 761 . . . . . . . . . . 11 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) → (𝑦 / 2) ∈ ℝ+)
15 2rp 11713 . . . . . . . . . . . 12 2 ∈ ℝ+
16 i1ff 23249 . . . . . . . . . . . . . . . . . . . . 21 (𝑓 ∈ dom ∫1𝑓:ℝ⟶ℝ)
17 frn 5966 . . . . . . . . . . . . . . . . . . . . 21 (𝑓:ℝ⟶ℝ → ran 𝑓 ⊆ ℝ)
1816, 17syl 17 . . . . . . . . . . . . . . . . . . . 20 (𝑓 ∈ dom ∫1 → ran 𝑓 ⊆ ℝ)
1918adantr 480 . . . . . . . . . . . . . . . . . . 19 ((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) → ran 𝑓 ⊆ ℝ)
20 i1ff 23249 . . . . . . . . . . . . . . . . . . . . 21 (𝑔 ∈ dom ∫1𝑔:ℝ⟶ℝ)
21 frn 5966 . . . . . . . . . . . . . . . . . . . . 21 (𝑔:ℝ⟶ℝ → ran 𝑔 ⊆ ℝ)
2220, 21syl 17 . . . . . . . . . . . . . . . . . . . 20 (𝑔 ∈ dom ∫1 → ran 𝑔 ⊆ ℝ)
2322adantl 481 . . . . . . . . . . . . . . . . . . 19 ((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) → ran 𝑔 ⊆ ℝ)
2419, 23unssd 3751 . . . . . . . . . . . . . . . . . 18 ((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) → (ran 𝑓 ∪ ran 𝑔) ⊆ ℝ)
25 ax-resscn 9872 . . . . . . . . . . . . . . . . . 18 ℝ ⊆ ℂ
2624, 25syl6ss 3580 . . . . . . . . . . . . . . . . 17 ((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) → (ran 𝑓 ∪ ran 𝑔) ⊆ ℂ)
27 i1f0rn 23255 . . . . . . . . . . . . . . . . . . 19 (𝑓 ∈ dom ∫1 → 0 ∈ ran 𝑓)
28 elun1 3742 . . . . . . . . . . . . . . . . . . 19 (0 ∈ ran 𝑓 → 0 ∈ (ran 𝑓 ∪ ran 𝑔))
2927, 28syl 17 . . . . . . . . . . . . . . . . . 18 (𝑓 ∈ dom ∫1 → 0 ∈ (ran 𝑓 ∪ ran 𝑔))
3029adantr 480 . . . . . . . . . . . . . . . . 17 ((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) → 0 ∈ (ran 𝑓 ∪ ran 𝑔))
31 absf 13925 . . . . . . . . . . . . . . . . . . 19 abs:ℂ⟶ℝ
32 ffn 5958 . . . . . . . . . . . . . . . . . . 19 (abs:ℂ⟶ℝ → abs Fn ℂ)
3331, 32ax-mp 5 . . . . . . . . . . . . . . . . . 18 abs Fn ℂ
34 fnfvima 6400 . . . . . . . . . . . . . . . . . 18 ((abs Fn ℂ ∧ (ran 𝑓 ∪ ran 𝑔) ⊆ ℂ ∧ 0 ∈ (ran 𝑓 ∪ ran 𝑔)) → (abs‘0) ∈ (abs “ (ran 𝑓 ∪ ran 𝑔)))
3533, 34mp3an1 1403 . . . . . . . . . . . . . . . . 17 (((ran 𝑓 ∪ ran 𝑔) ⊆ ℂ ∧ 0 ∈ (ran 𝑓 ∪ ran 𝑔)) → (abs‘0) ∈ (abs “ (ran 𝑓 ∪ ran 𝑔)))
3626, 30, 35syl2anc 691 . . . . . . . . . . . . . . . 16 ((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) → (abs‘0) ∈ (abs “ (ran 𝑓 ∪ ran 𝑔)))
37 ne0i 3880 . . . . . . . . . . . . . . . 16 ((abs‘0) ∈ (abs “ (ran 𝑓 ∪ ran 𝑔)) → (abs “ (ran 𝑓 ∪ ran 𝑔)) ≠ ∅)
3836, 37syl 17 . . . . . . . . . . . . . . 15 ((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) → (abs “ (ran 𝑓 ∪ ran 𝑔)) ≠ ∅)
39 imassrn 5396 . . . . . . . . . . . . . . . . 17 (abs “ (ran 𝑓 ∪ ran 𝑔)) ⊆ ran abs
40 frn 5966 . . . . . . . . . . . . . . . . . 18 (abs:ℂ⟶ℝ → ran abs ⊆ ℝ)
4131, 40ax-mp 5 . . . . . . . . . . . . . . . . 17 ran abs ⊆ ℝ
4239, 41sstri 3577 . . . . . . . . . . . . . . . 16 (abs “ (ran 𝑓 ∪ ran 𝑔)) ⊆ ℝ
43 ffun 5961 . . . . . . . . . . . . . . . . . 18 (abs:ℂ⟶ℝ → Fun abs)
4431, 43ax-mp 5 . . . . . . . . . . . . . . . . 17 Fun abs
45 i1frn 23250 . . . . . . . . . . . . . . . . . 18 (𝑓 ∈ dom ∫1 → ran 𝑓 ∈ Fin)
46 i1frn 23250 . . . . . . . . . . . . . . . . . 18 (𝑔 ∈ dom ∫1 → ran 𝑔 ∈ Fin)
47 unfi 8112 . . . . . . . . . . . . . . . . . 18 ((ran 𝑓 ∈ Fin ∧ ran 𝑔 ∈ Fin) → (ran 𝑓 ∪ ran 𝑔) ∈ Fin)
4845, 46, 47syl2an 493 . . . . . . . . . . . . . . . . 17 ((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) → (ran 𝑓 ∪ ran 𝑔) ∈ Fin)
49 imafi 8142 . . . . . . . . . . . . . . . . 17 ((Fun abs ∧ (ran 𝑓 ∪ ran 𝑔) ∈ Fin) → (abs “ (ran 𝑓 ∪ ran 𝑔)) ∈ Fin)
5044, 48, 49sylancr 694 . . . . . . . . . . . . . . . 16 ((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) → (abs “ (ran 𝑓 ∪ ran 𝑔)) ∈ Fin)
51 fimaxre2 10848 . . . . . . . . . . . . . . . 16 (((abs “ (ran 𝑓 ∪ ran 𝑔)) ⊆ ℝ ∧ (abs “ (ran 𝑓 ∪ ran 𝑔)) ∈ Fin) → ∃𝑥 ∈ ℝ ∀𝑦 ∈ (abs “ (ran 𝑓 ∪ ran 𝑔))𝑦𝑥)
5242, 50, 51sylancr 694 . . . . . . . . . . . . . . 15 ((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) → ∃𝑥 ∈ ℝ ∀𝑦 ∈ (abs “ (ran 𝑓 ∪ ran 𝑔))𝑦𝑥)
53 suprcl 10862 . . . . . . . . . . . . . . . 16 (((abs “ (ran 𝑓 ∪ ran 𝑔)) ⊆ ℝ ∧ (abs “ (ran 𝑓 ∪ ran 𝑔)) ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑦 ∈ (abs “ (ran 𝑓 ∪ ran 𝑔))𝑦𝑥) → sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ) ∈ ℝ)
5442, 53mp3an1 1403 . . . . . . . . . . . . . . 15 (((abs “ (ran 𝑓 ∪ ran 𝑔)) ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑦 ∈ (abs “ (ran 𝑓 ∪ ran 𝑔))𝑦𝑥) → sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ) ∈ ℝ)
5538, 52, 54syl2anc 691 . . . . . . . . . . . . . 14 ((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) → sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ) ∈ ℝ)
5655adantr 480 . . . . . . . . . . . . 13 (((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) → sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ) ∈ ℝ)
57 0red 9920 . . . . . . . . . . . . . . . 16 (((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ (𝑟 ∈ (ran 𝑓 ∪ ran 𝑔) ∧ 𝑟 ≠ 0)) → 0 ∈ ℝ)
5826sselda 3568 . . . . . . . . . . . . . . . . . 18 (((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ 𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)) → 𝑟 ∈ ℂ)
5958abscld 14023 . . . . . . . . . . . . . . . . 17 (((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ 𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)) → (abs‘𝑟) ∈ ℝ)
6059adantrr 749 . . . . . . . . . . . . . . . 16 (((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ (𝑟 ∈ (ran 𝑓 ∪ ran 𝑔) ∧ 𝑟 ≠ 0)) → (abs‘𝑟) ∈ ℝ)
6155adantr 480 . . . . . . . . . . . . . . . 16 (((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ (𝑟 ∈ (ran 𝑓 ∪ ran 𝑔) ∧ 𝑟 ≠ 0)) → sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ) ∈ ℝ)
62 absgt0 13912 . . . . . . . . . . . . . . . . . . 19 (𝑟 ∈ ℂ → (𝑟 ≠ 0 ↔ 0 < (abs‘𝑟)))
6358, 62syl 17 . . . . . . . . . . . . . . . . . 18 (((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ 𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)) → (𝑟 ≠ 0 ↔ 0 < (abs‘𝑟)))
6463biimpd 218 . . . . . . . . . . . . . . . . 17 (((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ 𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)) → (𝑟 ≠ 0 → 0 < (abs‘𝑟)))
6564impr 647 . . . . . . . . . . . . . . . 16 (((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ (𝑟 ∈ (ran 𝑓 ∪ ran 𝑔) ∧ 𝑟 ≠ 0)) → 0 < (abs‘𝑟))
6642a1i 11 . . . . . . . . . . . . . . . . . . . 20 ((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) → (abs “ (ran 𝑓 ∪ ran 𝑔)) ⊆ ℝ)
6766, 38, 523jca 1235 . . . . . . . . . . . . . . . . . . 19 ((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) → ((abs “ (ran 𝑓 ∪ ran 𝑔)) ⊆ ℝ ∧ (abs “ (ran 𝑓 ∪ ran 𝑔)) ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑦 ∈ (abs “ (ran 𝑓 ∪ ran 𝑔))𝑦𝑥))
6867adantr 480 . . . . . . . . . . . . . . . . . 18 (((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ 𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)) → ((abs “ (ran 𝑓 ∪ ran 𝑔)) ⊆ ℝ ∧ (abs “ (ran 𝑓 ∪ ran 𝑔)) ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑦 ∈ (abs “ (ran 𝑓 ∪ ran 𝑔))𝑦𝑥))
69 fnfvima 6400 . . . . . . . . . . . . . . . . . . . 20 ((abs Fn ℂ ∧ (ran 𝑓 ∪ ran 𝑔) ⊆ ℂ ∧ 𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)) → (abs‘𝑟) ∈ (abs “ (ran 𝑓 ∪ ran 𝑔)))
7033, 69mp3an1 1403 . . . . . . . . . . . . . . . . . . 19 (((ran 𝑓 ∪ ran 𝑔) ⊆ ℂ ∧ 𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)) → (abs‘𝑟) ∈ (abs “ (ran 𝑓 ∪ ran 𝑔)))
7126, 70sylan 487 . . . . . . . . . . . . . . . . . 18 (((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ 𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)) → (abs‘𝑟) ∈ (abs “ (ran 𝑓 ∪ ran 𝑔)))
72 suprub 10863 . . . . . . . . . . . . . . . . . 18 ((((abs “ (ran 𝑓 ∪ ran 𝑔)) ⊆ ℝ ∧ (abs “ (ran 𝑓 ∪ ran 𝑔)) ≠ ∅ ∧ ∃𝑥 ∈ ℝ ∀𝑦 ∈ (abs “ (ran 𝑓 ∪ ran 𝑔))𝑦𝑥) ∧ (abs‘𝑟) ∈ (abs “ (ran 𝑓 ∪ ran 𝑔))) → (abs‘𝑟) ≤ sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))
7368, 71, 72syl2anc 691 . . . . . . . . . . . . . . . . 17 (((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ 𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)) → (abs‘𝑟) ≤ sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))
7473adantrr 749 . . . . . . . . . . . . . . . 16 (((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ (𝑟 ∈ (ran 𝑓 ∪ ran 𝑔) ∧ 𝑟 ≠ 0)) → (abs‘𝑟) ≤ sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))
7557, 60, 61, 65, 74ltletrd 10076 . . . . . . . . . . . . . . 15 (((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ (𝑟 ∈ (ran 𝑓 ∪ ran 𝑔) ∧ 𝑟 ≠ 0)) → 0 < sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))
7675rexlimdvaa 3014 . . . . . . . . . . . . . 14 ((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) → (∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0 → 0 < sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < )))
7776imp 444 . . . . . . . . . . . . 13 (((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) → 0 < sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))
7856, 77elrpd 11745 . . . . . . . . . . . 12 (((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) → sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ) ∈ ℝ+)
79 rpmulcl 11731 . . . . . . . . . . . 12 ((2 ∈ ℝ+ ∧ sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ) ∈ ℝ+) → (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < )) ∈ ℝ+)
8015, 78, 79sylancr 694 . . . . . . . . . . 11 (((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) → (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < )) ∈ ℝ+)
81 rpdivcl 11732 . . . . . . . . . . 11 (((𝑦 / 2) ∈ ℝ+ ∧ (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < )) ∈ ℝ+) → ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) ∈ ℝ+)
8214, 80, 81syl2an 493 . . . . . . . . . 10 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ ((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0)) → ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) ∈ ℝ+)
8382anassrs 678 . . . . . . . . 9 ((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) → ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) ∈ ℝ+)
8483adantlr 747 . . . . . . . 8 (((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) → ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) ∈ ℝ+)
85 ancom 465 . . . . . . . . . . . 12 ((𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+) ↔ (𝑦 ∈ ℝ+𝑢 ∈ (𝐴[,]𝐵)))
8685anbi2i 726 . . . . . . . . . . 11 (((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ↔ ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ (𝑦 ∈ ℝ+𝑢 ∈ (𝐴[,]𝐵))))
87 an32 835 . . . . . . . . . . . . . . 15 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ↔ ((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)))
8887anbi1i 727 . . . . . . . . . . . . . 14 ((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ↔ (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)))
89 an32 835 . . . . . . . . . . . . . 14 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ↔ (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)))
9088, 89bitri 263 . . . . . . . . . . . . 13 ((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ↔ (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)))
9190anbi1i 727 . . . . . . . . . . . 12 (((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ↔ ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0))
92 an32 835 . . . . . . . . . . . 12 (((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ↔ ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)))
9391, 92bitri 263 . . . . . . . . . . 11 (((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ↔ ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)))
94 anass 679 . . . . . . . . . . 11 ((((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ 𝑦 ∈ ℝ+) ∧ 𝑢 ∈ (𝐴[,]𝐵)) ↔ ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ (𝑦 ∈ ℝ+𝑢 ∈ (𝐴[,]𝐵))))
9586, 93, 943bitr4i 291 . . . . . . . . . 10 (((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ↔ (((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ 𝑦 ∈ ℝ+) ∧ 𝑢 ∈ (𝐴[,]𝐵)))
96 oveq12 6558 . . . . . . . . . . . . . . . 16 ((𝑏 = 𝑤𝑎 = 𝑢) → (𝑏𝑎) = (𝑤𝑢))
9796ancoms 468 . . . . . . . . . . . . . . 15 ((𝑎 = 𝑢𝑏 = 𝑤) → (𝑏𝑎) = (𝑤𝑢))
9897fveq2d 6107 . . . . . . . . . . . . . 14 ((𝑎 = 𝑢𝑏 = 𝑤) → (abs‘(𝑏𝑎)) = (abs‘(𝑤𝑢)))
9998breq1d 4593 . . . . . . . . . . . . 13 ((𝑎 = 𝑢𝑏 = 𝑤) → ((abs‘(𝑏𝑎)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) ↔ (abs‘(𝑤𝑢)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < )))))
100 fveq2 6103 . . . . . . . . . . . . . . . 16 (𝑏 = 𝑤 → (𝐺𝑏) = (𝐺𝑤))
101 fveq2 6103 . . . . . . . . . . . . . . . 16 (𝑎 = 𝑢 → (𝐺𝑎) = (𝐺𝑢))
102100, 101oveqan12rd 6569 . . . . . . . . . . . . . . 15 ((𝑎 = 𝑢𝑏 = 𝑤) → ((𝐺𝑏) − (𝐺𝑎)) = ((𝐺𝑤) − (𝐺𝑢)))
103102fveq2d 6107 . . . . . . . . . . . . . 14 ((𝑎 = 𝑢𝑏 = 𝑤) → (abs‘((𝐺𝑏) − (𝐺𝑎))) = (abs‘((𝐺𝑤) − (𝐺𝑢))))
104103breq1d 4593 . . . . . . . . . . . . 13 ((𝑎 = 𝑢𝑏 = 𝑤) → ((abs‘((𝐺𝑏) − (𝐺𝑎))) < 𝑦 ↔ (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
10599, 104imbi12d 333 . . . . . . . . . . . 12 ((𝑎 = 𝑢𝑏 = 𝑤) → (((abs‘(𝑏𝑎)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) → (abs‘((𝐺𝑏) − (𝐺𝑎))) < 𝑦) ↔ ((abs‘(𝑤𝑢)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦)))
106 oveq12 6558 . . . . . . . . . . . . . . . 16 ((𝑏 = 𝑢𝑎 = 𝑤) → (𝑏𝑎) = (𝑢𝑤))
107106ancoms 468 . . . . . . . . . . . . . . 15 ((𝑎 = 𝑤𝑏 = 𝑢) → (𝑏𝑎) = (𝑢𝑤))
108107fveq2d 6107 . . . . . . . . . . . . . 14 ((𝑎 = 𝑤𝑏 = 𝑢) → (abs‘(𝑏𝑎)) = (abs‘(𝑢𝑤)))
109108breq1d 4593 . . . . . . . . . . . . 13 ((𝑎 = 𝑤𝑏 = 𝑢) → ((abs‘(𝑏𝑎)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) ↔ (abs‘(𝑢𝑤)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < )))))
110 fveq2 6103 . . . . . . . . . . . . . . . 16 (𝑏 = 𝑢 → (𝐺𝑏) = (𝐺𝑢))
111 fveq2 6103 . . . . . . . . . . . . . . . 16 (𝑎 = 𝑤 → (𝐺𝑎) = (𝐺𝑤))
112110, 111oveqan12rd 6569 . . . . . . . . . . . . . . 15 ((𝑎 = 𝑤𝑏 = 𝑢) → ((𝐺𝑏) − (𝐺𝑎)) = ((𝐺𝑢) − (𝐺𝑤)))
113112fveq2d 6107 . . . . . . . . . . . . . 14 ((𝑎 = 𝑤𝑏 = 𝑢) → (abs‘((𝐺𝑏) − (𝐺𝑎))) = (abs‘((𝐺𝑢) − (𝐺𝑤))))
114113breq1d 4593 . . . . . . . . . . . . 13 ((𝑎 = 𝑤𝑏 = 𝑢) → ((abs‘((𝐺𝑏) − (𝐺𝑎))) < 𝑦 ↔ (abs‘((𝐺𝑢) − (𝐺𝑤))) < 𝑦))
115109, 114imbi12d 333 . . . . . . . . . . . 12 ((𝑎 = 𝑤𝑏 = 𝑢) → (((abs‘(𝑏𝑎)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) → (abs‘((𝐺𝑏) − (𝐺𝑎))) < 𝑦) ↔ ((abs‘(𝑢𝑤)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) → (abs‘((𝐺𝑢) − (𝐺𝑤))) < 𝑦)))
116 iccssre 12126 . . . . . . . . . . . . . 14 ((𝐴 ∈ ℝ ∧ 𝐵 ∈ ℝ) → (𝐴[,]𝐵) ⊆ ℝ)
1172, 3, 116syl2anc 691 . . . . . . . . . . . . 13 (𝜑 → (𝐴[,]𝐵) ⊆ ℝ)
118117ad4antr 764 . . . . . . . . . . . 12 (((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ 𝑦 ∈ ℝ+) → (𝐴[,]𝐵) ⊆ ℝ)
119 simp-4l 802 . . . . . . . . . . . . 13 (((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ 𝑦 ∈ ℝ+) → 𝜑)
120117, 25syl6ss 3580 . . . . . . . . . . . . . . . . . 18 (𝜑 → (𝐴[,]𝐵) ⊆ ℂ)
121120sselda 3568 . . . . . . . . . . . . . . . . 17 ((𝜑𝑤 ∈ (𝐴[,]𝐵)) → 𝑤 ∈ ℂ)
122120sselda 3568 . . . . . . . . . . . . . . . . 17 ((𝜑𝑢 ∈ (𝐴[,]𝐵)) → 𝑢 ∈ ℂ)
123 abssub 13914 . . . . . . . . . . . . . . . . 17 ((𝑤 ∈ ℂ ∧ 𝑢 ∈ ℂ) → (abs‘(𝑤𝑢)) = (abs‘(𝑢𝑤)))
124121, 122, 123syl2anr 494 . . . . . . . . . . . . . . . 16 (((𝜑𝑢 ∈ (𝐴[,]𝐵)) ∧ (𝜑𝑤 ∈ (𝐴[,]𝐵))) → (abs‘(𝑤𝑢)) = (abs‘(𝑢𝑤)))
125124anandis 869 . . . . . . . . . . . . . . 15 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (abs‘(𝑤𝑢)) = (abs‘(𝑢𝑤)))
126125breq1d 4593 . . . . . . . . . . . . . 14 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → ((abs‘(𝑤𝑢)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) ↔ (abs‘(𝑢𝑤)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < )))))
1279ffvelrnda 6267 . . . . . . . . . . . . . . . . 17 ((𝜑𝑤 ∈ (𝐴[,]𝐵)) → (𝐺𝑤) ∈ ℂ)
1289ffvelrnda 6267 . . . . . . . . . . . . . . . . 17 ((𝜑𝑢 ∈ (𝐴[,]𝐵)) → (𝐺𝑢) ∈ ℂ)
129 abssub 13914 . . . . . . . . . . . . . . . . 17 (((𝐺𝑤) ∈ ℂ ∧ (𝐺𝑢) ∈ ℂ) → (abs‘((𝐺𝑤) − (𝐺𝑢))) = (abs‘((𝐺𝑢) − (𝐺𝑤))))
130127, 128, 129syl2anr 494 . . . . . . . . . . . . . . . 16 (((𝜑𝑢 ∈ (𝐴[,]𝐵)) ∧ (𝜑𝑤 ∈ (𝐴[,]𝐵))) → (abs‘((𝐺𝑤) − (𝐺𝑢))) = (abs‘((𝐺𝑢) − (𝐺𝑤))))
131130anandis 869 . . . . . . . . . . . . . . 15 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (abs‘((𝐺𝑤) − (𝐺𝑢))) = (abs‘((𝐺𝑢) − (𝐺𝑤))))
132131breq1d 4593 . . . . . . . . . . . . . 14 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → ((abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦 ↔ (abs‘((𝐺𝑢) − (𝐺𝑤))) < 𝑦))
133126, 132imbi12d 333 . . . . . . . . . . . . 13 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (((abs‘(𝑤𝑢)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦) ↔ ((abs‘(𝑢𝑤)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) → (abs‘((𝐺𝑢) − (𝐺𝑤))) < 𝑦)))
134119, 133sylan 487 . . . . . . . . . . . 12 ((((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ 𝑦 ∈ ℝ+) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (((abs‘(𝑤𝑢)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦) ↔ ((abs‘(𝑢𝑤)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) → (abs‘((𝐺𝑢) − (𝐺𝑤))) < 𝑦)))
1352rexrd 9968 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (𝜑𝐴 ∈ ℝ*)
1363rexrd 9968 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (𝜑𝐵 ∈ ℝ*)
137135, 136jca 553 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (𝜑 → (𝐴 ∈ ℝ*𝐵 ∈ ℝ*))
138 df-icc 12053 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 [,] = (𝑥 ∈ ℝ*, 𝑦 ∈ ℝ* ↦ {𝑡 ∈ ℝ* ∣ (𝑥𝑡𝑡𝑦)})
139138elixx3g 12059 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 (𝑢 ∈ (𝐴[,]𝐵) ↔ ((𝐴 ∈ ℝ*𝐵 ∈ ℝ*𝑢 ∈ ℝ*) ∧ (𝐴𝑢𝑢𝐵)))
140139simprbi 479 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (𝑢 ∈ (𝐴[,]𝐵) → (𝐴𝑢𝑢𝐵))
141140simpld 474 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (𝑢 ∈ (𝐴[,]𝐵) → 𝐴𝑢)
142138elixx3g 12059 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 (𝑤 ∈ (𝐴[,]𝐵) ↔ ((𝐴 ∈ ℝ*𝐵 ∈ ℝ*𝑤 ∈ ℝ*) ∧ (𝐴𝑤𝑤𝐵)))
143142simprbi 479 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (𝑤 ∈ (𝐴[,]𝐵) → (𝐴𝑤𝑤𝐵))
144143simprd 478 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (𝑤 ∈ (𝐴[,]𝐵) → 𝑤𝐵)
145141, 144anim12i 588 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → (𝐴𝑢𝑤𝐵))
146 ioossioo 12136 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (((𝐴 ∈ ℝ*𝐵 ∈ ℝ*) ∧ (𝐴𝑢𝑤𝐵)) → (𝑢(,)𝑤) ⊆ (𝐴(,)𝐵))
147137, 145, 146syl2an 493 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (𝑢(,)𝑤) ⊆ (𝐴(,)𝐵))
1485adantr 480 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (𝐴(,)𝐵) ⊆ 𝐷)
149147, 148sstrd 3578 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (𝑢(,)𝑤) ⊆ 𝐷)
150149sselda 3568 . . . . . . . . . . . . . . . . . . . . . . 23 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → 𝑡𝐷)
1518ffvelrnda 6267 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ((𝜑𝑡𝐷) → (𝐹𝑡) ∈ ℂ)
152151abscld 14023 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((𝜑𝑡𝐷) → (abs‘(𝐹𝑡)) ∈ ℝ)
153152rexrd 9968 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((𝜑𝑡𝐷) → (abs‘(𝐹𝑡)) ∈ ℝ*)
154151absge0d 14031 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((𝜑𝑡𝐷) → 0 ≤ (abs‘(𝐹𝑡)))
155 elxrge0 12152 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((abs‘(𝐹𝑡)) ∈ (0[,]+∞) ↔ ((abs‘(𝐹𝑡)) ∈ ℝ* ∧ 0 ≤ (abs‘(𝐹𝑡))))
156153, 154, 155sylanbrc 695 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝜑𝑡𝐷) → (abs‘(𝐹𝑡)) ∈ (0[,]+∞))
157156adantlr 747 . . . . . . . . . . . . . . . . . . . . . . 23 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡𝐷) → (abs‘(𝐹𝑡)) ∈ (0[,]+∞))
158150, 157syldan 486 . . . . . . . . . . . . . . . . . . . . . 22 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → (abs‘(𝐹𝑡)) ∈ (0[,]+∞))
159 0e0iccpnf 12154 . . . . . . . . . . . . . . . . . . . . . . 23 0 ∈ (0[,]+∞)
160159a1i 11 . . . . . . . . . . . . . . . . . . . . . 22 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ ¬ 𝑡 ∈ (𝑢(,)𝑤)) → 0 ∈ (0[,]+∞))
161158, 160ifclda 4070 . . . . . . . . . . . . . . . . . . . . 21 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ∈ (0[,]+∞))
162161adantr 480 . . . . . . . . . . . . . . . . . . . 20 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ ℝ) → if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ∈ (0[,]+∞))
163 eqid 2610 . . . . . . . . . . . . . . . . . . . 20 (𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0)) = (𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))
164162, 163fmptd 6292 . . . . . . . . . . . . . . . . . . 19 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0)):ℝ⟶(0[,]+∞))
165 itg2cl 23305 . . . . . . . . . . . . . . . . . . 19 ((𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0)):ℝ⟶(0[,]+∞) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))) ∈ ℝ*)
166164, 165syl 17 . . . . . . . . . . . . . . . . . 18 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))) ∈ ℝ*)
1671663adantr3 1215 . . . . . . . . . . . . . . . . 17 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))) ∈ ℝ*)
168119, 167sylan 487 . . . . . . . . . . . . . . . 16 ((((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ 𝑦 ∈ ℝ+) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))) ∈ ℝ*)
169168adantr 480 . . . . . . . . . . . . . . 15 (((((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ 𝑦 ∈ ℝ+) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) ∧ (abs‘(𝑤𝑢)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < )))) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))) ∈ ℝ*)
170 simplll 794 . . . . . . . . . . . . . . . . 17 (((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ 𝑦 ∈ ℝ+) → (𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)))
171151adantlr 747 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡𝐷) → (𝐹𝑡) ∈ ℂ)
172150, 171syldan 486 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → (𝐹𝑡) ∈ ℂ)
173172adantllr 751 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → (𝐹𝑡) ∈ ℂ)
174 elioore 12076 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 (𝑡 ∈ (𝑢(,)𝑤) → 𝑡 ∈ ℝ)
17516ffvelrnda 6267 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 ((𝑓 ∈ dom ∫1𝑡 ∈ ℝ) → (𝑓𝑡) ∈ ℝ)
176175recnd 9947 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 ((𝑓 ∈ dom ∫1𝑡 ∈ ℝ) → (𝑓𝑡) ∈ ℂ)
177 ax-icn 9874 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 i ∈ ℂ
17820ffvelrnda 6267 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 ((𝑔 ∈ dom ∫1𝑡 ∈ ℝ) → (𝑔𝑡) ∈ ℝ)
179178recnd 9947 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 ((𝑔 ∈ dom ∫1𝑡 ∈ ℝ) → (𝑔𝑡) ∈ ℂ)
180 mulcl 9899 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 ((i ∈ ℂ ∧ (𝑔𝑡) ∈ ℂ) → (i · (𝑔𝑡)) ∈ ℂ)
181177, 179, 180sylancr 694 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 ((𝑔 ∈ dom ∫1𝑡 ∈ ℝ) → (i · (𝑔𝑡)) ∈ ℂ)
182 addcl 9897 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 (((𝑓𝑡) ∈ ℂ ∧ (i · (𝑔𝑡)) ∈ ℂ) → ((𝑓𝑡) + (i · (𝑔𝑡))) ∈ ℂ)
183176, 181, 182syl2an 493 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 (((𝑓 ∈ dom ∫1𝑡 ∈ ℝ) ∧ (𝑔 ∈ dom ∫1𝑡 ∈ ℝ)) → ((𝑓𝑡) + (i · (𝑔𝑡))) ∈ ℂ)
184183anandirs 870 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 (((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ) → ((𝑓𝑡) + (i · (𝑔𝑡))) ∈ ℂ)
185174, 184sylan2 490 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 (((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → ((𝑓𝑡) + (i · (𝑔𝑡))) ∈ ℂ)
186185adantll 746 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → ((𝑓𝑡) + (i · (𝑔𝑡))) ∈ ℂ)
187186adantlr 747 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → ((𝑓𝑡) + (i · (𝑔𝑡))) ∈ ℂ)
188173, 187subcld 10271 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → ((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡)))) ∈ ℂ)
189188abscld 14023 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → (abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) ∈ ℝ)
190185abscld 14023 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → (abs‘((𝑓𝑡) + (i · (𝑔𝑡)))) ∈ ℝ)
191190adantll 746 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → (abs‘((𝑓𝑡) + (i · (𝑔𝑡)))) ∈ ℝ)
192191adantlr 747 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → (abs‘((𝑓𝑡) + (i · (𝑔𝑡)))) ∈ ℝ)
193189, 192readdcld 9948 . . . . . . . . . . . . . . . . . . . . . . . 24 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))) ∈ ℝ)
194193rexrd 9968 . . . . . . . . . . . . . . . . . . . . . . 23 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))) ∈ ℝ*)
195188absge0d 14031 . . . . . . . . . . . . . . . . . . . . . . . 24 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → 0 ≤ (abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))))
196184absge0d 14031 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ) → 0 ≤ (abs‘((𝑓𝑡) + (i · (𝑔𝑡)))))
197174, 196sylan2 490 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → 0 ≤ (abs‘((𝑓𝑡) + (i · (𝑔𝑡)))))
198197adantll 746 . . . . . . . . . . . . . . . . . . . . . . . . 25 (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → 0 ≤ (abs‘((𝑓𝑡) + (i · (𝑔𝑡)))))
199198adantlr 747 . . . . . . . . . . . . . . . . . . . . . . . 24 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → 0 ≤ (abs‘((𝑓𝑡) + (i · (𝑔𝑡)))))
200189, 192, 195, 199addge0d 10482 . . . . . . . . . . . . . . . . . . . . . . 23 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → 0 ≤ ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))))
201 elxrge0 12152 . . . . . . . . . . . . . . . . . . . . . . 23 (((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))) ∈ (0[,]+∞) ↔ (((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))) ∈ ℝ* ∧ 0 ≤ ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡)))))))
202194, 200, 201sylanbrc 695 . . . . . . . . . . . . . . . . . . . . . 22 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))) ∈ (0[,]+∞))
203159a1i 11 . . . . . . . . . . . . . . . . . . . . . 22 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ ¬ 𝑡 ∈ (𝑢(,)𝑤)) → 0 ∈ (0[,]+∞))
204202, 203ifclda 4070 . . . . . . . . . . . . . . . . . . . . 21 (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0) ∈ (0[,]+∞))
205204adantr 480 . . . . . . . . . . . . . . . . . . . 20 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ ℝ) → if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0) ∈ (0[,]+∞))
206 eqid 2610 . . . . . . . . . . . . . . . . . . . 20 (𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0)) = (𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0))
207205, 206fmptd 6292 . . . . . . . . . . . . . . . . . . 19 (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0)):ℝ⟶(0[,]+∞))
208 itg2cl 23305 . . . . . . . . . . . . . . . . . . 19 ((𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0)):ℝ⟶(0[,]+∞) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0))) ∈ ℝ*)
209207, 208syl 17 . . . . . . . . . . . . . . . . . 18 (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0))) ∈ ℝ*)
2102093adantr3 1215 . . . . . . . . . . . . . . . . 17 (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0))) ∈ ℝ*)
211170, 210sylan 487 . . . . . . . . . . . . . . . 16 ((((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ 𝑦 ∈ ℝ+) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0))) ∈ ℝ*)
212211adantr 480 . . . . . . . . . . . . . . 15 (((((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ 𝑦 ∈ ℝ+) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) ∧ (abs‘(𝑤𝑢)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < )))) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0))) ∈ ℝ*)
213 rpxr 11716 . . . . . . . . . . . . . . . 16 (𝑦 ∈ ℝ+𝑦 ∈ ℝ*)
214213ad3antlr 763 . . . . . . . . . . . . . . 15 (((((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ 𝑦 ∈ ℝ+) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) ∧ (abs‘(𝑤𝑢)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < )))) → 𝑦 ∈ ℝ*)
215161adantlr 747 . . . . . . . . . . . . . . . . . . . . 21 (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ∈ (0[,]+∞))
216215adantr 480 . . . . . . . . . . . . . . . . . . . 20 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ ℝ) → if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ∈ (0[,]+∞))
217216, 163fmptd 6292 . . . . . . . . . . . . . . . . . . 19 (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0)):ℝ⟶(0[,]+∞))
218173, 187npcand 10275 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → (((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡)))) + ((𝑓𝑡) + (i · (𝑔𝑡)))) = (𝐹𝑡))
219218fveq2d 6107 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → (abs‘(((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡)))) + ((𝑓𝑡) + (i · (𝑔𝑡))))) = (abs‘(𝐹𝑡)))
220188, 187abstrid 14043 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → (abs‘(((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡)))) + ((𝑓𝑡) + (i · (𝑔𝑡))))) ≤ ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))))
221219, 220eqbrtrrd 4607 . . . . . . . . . . . . . . . . . . . . . . . 24 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → (abs‘(𝐹𝑡)) ≤ ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))))
222 iftrue 4042 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑡 ∈ (𝑢(,)𝑤) → if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) = (abs‘(𝐹𝑡)))
223222adantl 481 . . . . . . . . . . . . . . . . . . . . . . . 24 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) = (abs‘(𝐹𝑡)))
224 iftrue 4042 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑡 ∈ (𝑢(,)𝑤) → if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0) = ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))))
225224adantl 481 . . . . . . . . . . . . . . . . . . . . . . . 24 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0) = ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))))
226221, 223, 2253brtr4d 4615 . . . . . . . . . . . . . . . . . . . . . . 23 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ≤ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0))
227226ex 449 . . . . . . . . . . . . . . . . . . . . . 22 (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (𝑡 ∈ (𝑢(,)𝑤) → if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ≤ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0)))
228 0le0 10987 . . . . . . . . . . . . . . . . . . . . . . . 24 0 ≤ 0
229228a1i 11 . . . . . . . . . . . . . . . . . . . . . . 23 𝑡 ∈ (𝑢(,)𝑤) → 0 ≤ 0)
230 iffalse 4045 . . . . . . . . . . . . . . . . . . . . . . 23 𝑡 ∈ (𝑢(,)𝑤) → if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) = 0)
231 iffalse 4045 . . . . . . . . . . . . . . . . . . . . . . 23 𝑡 ∈ (𝑢(,)𝑤) → if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0) = 0)
232229, 230, 2313brtr4d 4615 . . . . . . . . . . . . . . . . . . . . . 22 𝑡 ∈ (𝑢(,)𝑤) → if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ≤ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0))
233227, 232pm2.61d1 170 . . . . . . . . . . . . . . . . . . . . 21 (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ≤ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0))
234233ralrimivw 2950 . . . . . . . . . . . . . . . . . . . 20 (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → ∀𝑡 ∈ ℝ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ≤ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0))
235 reex 9906 . . . . . . . . . . . . . . . . . . . . . . 23 ℝ ∈ V
236235a1i 11 . . . . . . . . . . . . . . . . . . . . . 22 (𝜑 → ℝ ∈ V)
237 fvex 6113 . . . . . . . . . . . . . . . . . . . . . . . 24 (abs‘(𝐹𝑡)) ∈ V
238 c0ex 9913 . . . . . . . . . . . . . . . . . . . . . . . 24 0 ∈ V
239237, 238ifex 4106 . . . . . . . . . . . . . . . . . . . . . . 23 if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ∈ V
240239a1i 11 . . . . . . . . . . . . . . . . . . . . . 22 ((𝜑𝑡 ∈ ℝ) → if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ∈ V)
241 ovex 6577 . . . . . . . . . . . . . . . . . . . . . . . 24 ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))) ∈ V
242241, 238ifex 4106 . . . . . . . . . . . . . . . . . . . . . . 23 if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0) ∈ V
243242a1i 11 . . . . . . . . . . . . . . . . . . . . . 22 ((𝜑𝑡 ∈ ℝ) → if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0) ∈ V)
244 eqidd 2611 . . . . . . . . . . . . . . . . . . . . . 22 (𝜑 → (𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0)) = (𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0)))
245 eqidd 2611 . . . . . . . . . . . . . . . . . . . . . 22 (𝜑 → (𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0)) = (𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0)))
246236, 240, 243, 244, 245ofrfval2 6813 . . . . . . . . . . . . . . . . . . . . 21 (𝜑 → ((𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0)) ∘𝑟 ≤ (𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0)) ↔ ∀𝑡 ∈ ℝ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ≤ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0)))
247246ad2antrr 758 . . . . . . . . . . . . . . . . . . . 20 (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → ((𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0)) ∘𝑟 ≤ (𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0)) ↔ ∀𝑡 ∈ ℝ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ≤ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0)))
248234, 247mpbird 246 . . . . . . . . . . . . . . . . . . 19 (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0)) ∘𝑟 ≤ (𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0)))
249 itg2le 23312 . . . . . . . . . . . . . . . . . . 19 (((𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0)):ℝ⟶(0[,]+∞) ∧ (𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0)):ℝ⟶(0[,]+∞) ∧ (𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0)) ∘𝑟 ≤ (𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0))) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0))))
250217, 207, 248, 249syl3anc 1318 . . . . . . . . . . . . . . . . . 18 (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0))))
2512503adantr3 1215 . . . . . . . . . . . . . . . . 17 (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0))))
252170, 251sylan 487 . . . . . . . . . . . . . . . 16 ((((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ 𝑦 ∈ ℝ+) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0))))
253252adantr 480 . . . . . . . . . . . . . . 15 (((((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ 𝑦 ∈ ℝ+) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) ∧ (abs‘(𝑤𝑢)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < )))) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0))))
2541, 2, 3, 4, 5, 6, 7, 8ftc1anclem8 32662 . . . . . . . . . . . . . . 15 (((((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ 𝑦 ∈ ℝ+) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) ∧ (abs‘(𝑤𝑢)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < )))) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), ((abs‘((𝐹𝑡) − ((𝑓𝑡) + (i · (𝑔𝑡))))) + (abs‘((𝑓𝑡) + (i · (𝑔𝑡))))), 0))) < 𝑦)
255169, 212, 214, 253, 254xrlelttrd 11867 . . . . . . . . . . . . . 14 (((((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ 𝑦 ∈ ℝ+) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) ∧ (abs‘(𝑤𝑢)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < )))) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))) < 𝑦)
256 simplll 794 . . . . . . . . . . . . . . . 16 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) → 𝜑)
257 simpr2 1061 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → 𝑤 ∈ (𝐴[,]𝐵))
258 oveq2 6557 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (𝑥 = 𝑤 → (𝐴(,)𝑥) = (𝐴(,)𝑤))
259 itgeq1 23345 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((𝐴(,)𝑥) = (𝐴(,)𝑤) → ∫(𝐴(,)𝑥)(𝐹𝑡) d𝑡 = ∫(𝐴(,)𝑤)(𝐹𝑡) d𝑡)
260258, 259syl 17 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑥 = 𝑤 → ∫(𝐴(,)𝑥)(𝐹𝑡) d𝑡 = ∫(𝐴(,)𝑤)(𝐹𝑡) d𝑡)
261 itgex 23343 . . . . . . . . . . . . . . . . . . . . . . . . 25 ∫(𝐴(,)𝑤)(𝐹𝑡) d𝑡 ∈ V
262260, 1, 261fvmpt 6191 . . . . . . . . . . . . . . . . . . . . . . . 24 (𝑤 ∈ (𝐴[,]𝐵) → (𝐺𝑤) = ∫(𝐴(,)𝑤)(𝐹𝑡) d𝑡)
263257, 262syl 17 . . . . . . . . . . . . . . . . . . . . . . 23 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (𝐺𝑤) = ∫(𝐴(,)𝑤)(𝐹𝑡) d𝑡)
2642adantr 480 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → 𝐴 ∈ ℝ)
265117sselda 3568 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((𝜑𝑤 ∈ (𝐴[,]𝐵)) → 𝑤 ∈ ℝ)
2662653ad2antr2 1220 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → 𝑤 ∈ ℝ)
267117sselda 3568 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ((𝜑𝑢 ∈ (𝐴[,]𝐵)) → 𝑢 ∈ ℝ)
268267rexrd 9968 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((𝜑𝑢 ∈ (𝐴[,]𝐵)) → 𝑢 ∈ ℝ*)
2692683ad2antr1 1219 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → 𝑢 ∈ ℝ*)
270 elicc1 12090 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ((𝐴 ∈ ℝ*𝐵 ∈ ℝ*) → (𝑢 ∈ (𝐴[,]𝐵) ↔ (𝑢 ∈ ℝ*𝐴𝑢𝑢𝐵)))
271135, 136, 270syl2anc 691 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (𝜑 → (𝑢 ∈ (𝐴[,]𝐵) ↔ (𝑢 ∈ ℝ*𝐴𝑢𝑢𝐵)))
272271biimpa 500 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ((𝜑𝑢 ∈ (𝐴[,]𝐵)) → (𝑢 ∈ ℝ*𝐴𝑢𝑢𝐵))
273272simp2d 1067 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((𝜑𝑢 ∈ (𝐴[,]𝐵)) → 𝐴𝑢)
2742733ad2antr1 1219 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → 𝐴𝑢)
275 simpr3 1062 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → 𝑢𝑤)
276135adantr 480 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ((𝜑𝑤 ∈ (𝐴[,]𝐵)) → 𝐴 ∈ ℝ*)
277265rexrd 9968 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ((𝜑𝑤 ∈ (𝐴[,]𝐵)) → 𝑤 ∈ ℝ*)
278 elicc1 12090 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ((𝐴 ∈ ℝ*𝑤 ∈ ℝ*) → (𝑢 ∈ (𝐴[,]𝑤) ↔ (𝑢 ∈ ℝ*𝐴𝑢𝑢𝑤)))
279276, 277, 278syl2anc 691 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((𝜑𝑤 ∈ (𝐴[,]𝐵)) → (𝑢 ∈ (𝐴[,]𝑤) ↔ (𝑢 ∈ ℝ*𝐴𝑢𝑢𝑤)))
2802793ad2antr2 1220 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (𝑢 ∈ (𝐴[,]𝑤) ↔ (𝑢 ∈ ℝ*𝐴𝑢𝑢𝑤)))
281269, 274, 275, 280mpbir3and 1238 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → 𝑢 ∈ (𝐴[,]𝑤))
282 iooss2 12082 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ((𝐵 ∈ ℝ*𝑤𝐵) → (𝐴(,)𝑤) ⊆ (𝐴(,)𝐵))
283136, 144, 282syl2an 493 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ((𝜑𝑤 ∈ (𝐴[,]𝐵)) → (𝐴(,)𝑤) ⊆ (𝐴(,)𝐵))
2845adantr 480 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ((𝜑𝑤 ∈ (𝐴[,]𝐵)) → (𝐴(,)𝐵) ⊆ 𝐷)
285283, 284sstrd 3578 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ((𝜑𝑤 ∈ (𝐴[,]𝐵)) → (𝐴(,)𝑤) ⊆ 𝐷)
2862853ad2antr2 1220 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (𝐴(,)𝑤) ⊆ 𝐷)
287286sselda 3568 . . . . . . . . . . . . . . . . . . . . . . . . 25 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) ∧ 𝑡 ∈ (𝐴(,)𝑤)) → 𝑡𝐷)
288151adantlr 747 . . . . . . . . . . . . . . . . . . . . . . . . 25 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) ∧ 𝑡𝐷) → (𝐹𝑡) ∈ ℂ)
289287, 288syldan 486 . . . . . . . . . . . . . . . . . . . . . . . 24 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) ∧ 𝑡 ∈ (𝐴(,)𝑤)) → (𝐹𝑡) ∈ ℂ)
290 eleq1 2676 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (𝑤 = 𝑢 → (𝑤 ∈ (𝐴[,]𝐵) ↔ 𝑢 ∈ (𝐴[,]𝐵)))
291290anbi2d 736 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (𝑤 = 𝑢 → ((𝜑𝑤 ∈ (𝐴[,]𝐵)) ↔ (𝜑𝑢 ∈ (𝐴[,]𝐵))))
292 oveq2 6557 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 (𝑤 = 𝑢 → (𝐴(,)𝑤) = (𝐴(,)𝑢))
293292mpteq1d 4666 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (𝑤 = 𝑢 → (𝑡 ∈ (𝐴(,)𝑤) ↦ (𝐹𝑡)) = (𝑡 ∈ (𝐴(,)𝑢) ↦ (𝐹𝑡)))
294293eleq1d 2672 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (𝑤 = 𝑢 → ((𝑡 ∈ (𝐴(,)𝑤) ↦ (𝐹𝑡)) ∈ 𝐿1 ↔ (𝑡 ∈ (𝐴(,)𝑢) ↦ (𝐹𝑡)) ∈ 𝐿1))
295291, 294imbi12d 333 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (𝑤 = 𝑢 → (((𝜑𝑤 ∈ (𝐴[,]𝐵)) → (𝑡 ∈ (𝐴(,)𝑤) ↦ (𝐹𝑡)) ∈ 𝐿1) ↔ ((𝜑𝑢 ∈ (𝐴[,]𝐵)) → (𝑡 ∈ (𝐴(,)𝑢) ↦ (𝐹𝑡)) ∈ 𝐿1)))
296 ioombl 23140 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (𝐴(,)𝑤) ∈ dom vol
297296a1i 11 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ((𝜑𝑤 ∈ (𝐴[,]𝐵)) → (𝐴(,)𝑤) ∈ dom vol)
298151adantlr 747 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (((𝜑𝑤 ∈ (𝐴[,]𝐵)) ∧ 𝑡𝐷) → (𝐹𝑡) ∈ ℂ)
2998feqmptd 6159 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 (𝜑𝐹 = (𝑡𝐷 ↦ (𝐹𝑡)))
300299, 7eqeltrrd 2689 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (𝜑 → (𝑡𝐷 ↦ (𝐹𝑡)) ∈ 𝐿1)
301300adantr 480 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ((𝜑𝑤 ∈ (𝐴[,]𝐵)) → (𝑡𝐷 ↦ (𝐹𝑡)) ∈ 𝐿1)
302285, 297, 298, 301iblss 23377 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((𝜑𝑤 ∈ (𝐴[,]𝐵)) → (𝑡 ∈ (𝐴(,)𝑤) ↦ (𝐹𝑡)) ∈ 𝐿1)
303295, 302chvarv 2251 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((𝜑𝑢 ∈ (𝐴[,]𝐵)) → (𝑡 ∈ (𝐴(,)𝑢) ↦ (𝐹𝑡)) ∈ 𝐿1)
3043033ad2antr1 1219 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (𝑡 ∈ (𝐴(,)𝑢) ↦ (𝐹𝑡)) ∈ 𝐿1)
305 ioombl 23140 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (𝑢(,)𝑤) ∈ dom vol
306305a1i 11 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (𝑢(,)𝑤) ∈ dom vol)
307 fvex 6113 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (𝐹𝑡) ∈ V
308307a1i 11 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡𝐷) → (𝐹𝑡) ∈ V)
309300adantr 480 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (𝑡𝐷 ↦ (𝐹𝑡)) ∈ 𝐿1)
310149, 306, 308, 309iblss 23377 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (𝑡 ∈ (𝑢(,)𝑤) ↦ (𝐹𝑡)) ∈ 𝐿1)
3113103adantr3 1215 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (𝑡 ∈ (𝑢(,)𝑤) ↦ (𝐹𝑡)) ∈ 𝐿1)
312264, 266, 281, 289, 304, 311itgsplitioo 23410 . . . . . . . . . . . . . . . . . . . . . . 23 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → ∫(𝐴(,)𝑤)(𝐹𝑡) d𝑡 = (∫(𝐴(,)𝑢)(𝐹𝑡) d𝑡 + ∫(𝑢(,)𝑤)(𝐹𝑡) d𝑡))
313263, 312eqtrd 2644 . . . . . . . . . . . . . . . . . . . . . 22 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (𝐺𝑤) = (∫(𝐴(,)𝑢)(𝐹𝑡) d𝑡 + ∫(𝑢(,)𝑤)(𝐹𝑡) d𝑡))
314 simpr1 1060 . . . . . . . . . . . . . . . . . . . . . . 23 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → 𝑢 ∈ (𝐴[,]𝐵))
315 oveq2 6557 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑥 = 𝑢 → (𝐴(,)𝑥) = (𝐴(,)𝑢))
316 itgeq1 23345 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((𝐴(,)𝑥) = (𝐴(,)𝑢) → ∫(𝐴(,)𝑥)(𝐹𝑡) d𝑡 = ∫(𝐴(,)𝑢)(𝐹𝑡) d𝑡)
317315, 316syl 17 . . . . . . . . . . . . . . . . . . . . . . . 24 (𝑥 = 𝑢 → ∫(𝐴(,)𝑥)(𝐹𝑡) d𝑡 = ∫(𝐴(,)𝑢)(𝐹𝑡) d𝑡)
318 itgex 23343 . . . . . . . . . . . . . . . . . . . . . . . 24 ∫(𝐴(,)𝑢)(𝐹𝑡) d𝑡 ∈ V
319317, 1, 318fvmpt 6191 . . . . . . . . . . . . . . . . . . . . . . 23 (𝑢 ∈ (𝐴[,]𝐵) → (𝐺𝑢) = ∫(𝐴(,)𝑢)(𝐹𝑡) d𝑡)
320314, 319syl 17 . . . . . . . . . . . . . . . . . . . . . 22 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (𝐺𝑢) = ∫(𝐴(,)𝑢)(𝐹𝑡) d𝑡)
321313, 320oveq12d 6567 . . . . . . . . . . . . . . . . . . . . 21 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → ((𝐺𝑤) − (𝐺𝑢)) = ((∫(𝐴(,)𝑢)(𝐹𝑡) d𝑡 + ∫(𝑢(,)𝑤)(𝐹𝑡) d𝑡) − ∫(𝐴(,)𝑢)(𝐹𝑡) d𝑡))
322307a1i 11 . . . . . . . . . . . . . . . . . . . . . . . . 25 (((𝜑𝑢 ∈ (𝐴[,]𝐵)) ∧ 𝑡 ∈ (𝐴(,)𝑢)) → (𝐹𝑡) ∈ V)
323322, 303itgcl 23356 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝜑𝑢 ∈ (𝐴[,]𝐵)) → ∫(𝐴(,)𝑢)(𝐹𝑡) d𝑡 ∈ ℂ)
324323adantrr 749 . . . . . . . . . . . . . . . . . . . . . . 23 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → ∫(𝐴(,)𝑢)(𝐹𝑡) d𝑡 ∈ ℂ)
325307a1i 11 . . . . . . . . . . . . . . . . . . . . . . . 24 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡 ∈ (𝑢(,)𝑤)) → (𝐹𝑡) ∈ V)
326325, 310itgcl 23356 . . . . . . . . . . . . . . . . . . . . . . 23 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → ∫(𝑢(,)𝑤)(𝐹𝑡) d𝑡 ∈ ℂ)
327324, 326pncan2d 10273 . . . . . . . . . . . . . . . . . . . . . 22 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → ((∫(𝐴(,)𝑢)(𝐹𝑡) d𝑡 + ∫(𝑢(,)𝑤)(𝐹𝑡) d𝑡) − ∫(𝐴(,)𝑢)(𝐹𝑡) d𝑡) = ∫(𝑢(,)𝑤)(𝐹𝑡) d𝑡)
3283273adantr3 1215 . . . . . . . . . . . . . . . . . . . . 21 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → ((∫(𝐴(,)𝑢)(𝐹𝑡) d𝑡 + ∫(𝑢(,)𝑤)(𝐹𝑡) d𝑡) − ∫(𝐴(,)𝑢)(𝐹𝑡) d𝑡) = ∫(𝑢(,)𝑤)(𝐹𝑡) d𝑡)
329321, 328eqtrd 2644 . . . . . . . . . . . . . . . . . . . 20 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → ((𝐺𝑤) − (𝐺𝑢)) = ∫(𝑢(,)𝑤)(𝐹𝑡) d𝑡)
330329fveq2d 6107 . . . . . . . . . . . . . . . . . . 19 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (abs‘((𝐺𝑤) − (𝐺𝑢))) = (abs‘∫(𝑢(,)𝑤)(𝐹𝑡) d𝑡))
331 ftc1anc.t . . . . . . . . . . . . . . . . . . . . 21 (𝜑 → ∀𝑠 ∈ ((,) “ ((𝐴[,]𝐵) × (𝐴[,]𝐵)))(abs‘∫𝑠(𝐹𝑡) d𝑡) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝑠, (abs‘(𝐹𝑡)), 0))))
332 df-ov 6552 . . . . . . . . . . . . . . . . . . . . . 22 (𝑢(,)𝑤) = ((,)‘⟨𝑢, 𝑤⟩)
333 opelxpi 5072 . . . . . . . . . . . . . . . . . . . . . . 23 ((𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → ⟨𝑢, 𝑤⟩ ∈ ((𝐴[,]𝐵) × (𝐴[,]𝐵)))
334 ioof 12142 . . . . . . . . . . . . . . . . . . . . . . . . 25 (,):(ℝ* × ℝ*)⟶𝒫 ℝ
335 ffn 5958 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((,):(ℝ* × ℝ*)⟶𝒫 ℝ → (,) Fn (ℝ* × ℝ*))
336334, 335ax-mp 5 . . . . . . . . . . . . . . . . . . . . . . . 24 (,) Fn (ℝ* × ℝ*)
337 iccssxr 12127 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝐴[,]𝐵) ⊆ ℝ*
338 xpss12 5148 . . . . . . . . . . . . . . . . . . . . . . . . 25 (((𝐴[,]𝐵) ⊆ ℝ* ∧ (𝐴[,]𝐵) ⊆ ℝ*) → ((𝐴[,]𝐵) × (𝐴[,]𝐵)) ⊆ (ℝ* × ℝ*))
339337, 337, 338mp2an 704 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝐴[,]𝐵) × (𝐴[,]𝐵)) ⊆ (ℝ* × ℝ*)
340 fnfvima 6400 . . . . . . . . . . . . . . . . . . . . . . . 24 (((,) Fn (ℝ* × ℝ*) ∧ ((𝐴[,]𝐵) × (𝐴[,]𝐵)) ⊆ (ℝ* × ℝ*) ∧ ⟨𝑢, 𝑤⟩ ∈ ((𝐴[,]𝐵) × (𝐴[,]𝐵))) → ((,)‘⟨𝑢, 𝑤⟩) ∈ ((,) “ ((𝐴[,]𝐵) × (𝐴[,]𝐵))))
341336, 339, 340mp3an12 1406 . . . . . . . . . . . . . . . . . . . . . . 23 (⟨𝑢, 𝑤⟩ ∈ ((𝐴[,]𝐵) × (𝐴[,]𝐵)) → ((,)‘⟨𝑢, 𝑤⟩) ∈ ((,) “ ((𝐴[,]𝐵) × (𝐴[,]𝐵))))
342333, 341syl 17 . . . . . . . . . . . . . . . . . . . . . 22 ((𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → ((,)‘⟨𝑢, 𝑤⟩) ∈ ((,) “ ((𝐴[,]𝐵) × (𝐴[,]𝐵))))
343332, 342syl5eqel 2692 . . . . . . . . . . . . . . . . . . . . 21 ((𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → (𝑢(,)𝑤) ∈ ((,) “ ((𝐴[,]𝐵) × (𝐴[,]𝐵))))
344 itgeq1 23345 . . . . . . . . . . . . . . . . . . . . . . . 24 (𝑠 = (𝑢(,)𝑤) → ∫𝑠(𝐹𝑡) d𝑡 = ∫(𝑢(,)𝑤)(𝐹𝑡) d𝑡)
345344fveq2d 6107 . . . . . . . . . . . . . . . . . . . . . . 23 (𝑠 = (𝑢(,)𝑤) → (abs‘∫𝑠(𝐹𝑡) d𝑡) = (abs‘∫(𝑢(,)𝑤)(𝐹𝑡) d𝑡))
346 eleq2 2677 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (𝑠 = (𝑢(,)𝑤) → (𝑡𝑠𝑡 ∈ (𝑢(,)𝑤)))
347346ifbid 4058 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝑠 = (𝑢(,)𝑤) → if(𝑡𝑠, (abs‘(𝐹𝑡)), 0) = if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))
348347mpteq2dv 4673 . . . . . . . . . . . . . . . . . . . . . . . 24 (𝑠 = (𝑢(,)𝑤) → (𝑡 ∈ ℝ ↦ if(𝑡𝑠, (abs‘(𝐹𝑡)), 0)) = (𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0)))
349348fveq2d 6107 . . . . . . . . . . . . . . . . . . . . . . 23 (𝑠 = (𝑢(,)𝑤) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝑠, (abs‘(𝐹𝑡)), 0))) = (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))))
350345, 349breq12d 4596 . . . . . . . . . . . . . . . . . . . . . 22 (𝑠 = (𝑢(,)𝑤) → ((abs‘∫𝑠(𝐹𝑡) d𝑡) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝑠, (abs‘(𝐹𝑡)), 0))) ↔ (abs‘∫(𝑢(,)𝑤)(𝐹𝑡) d𝑡) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0)))))
351350rspccva 3281 . . . . . . . . . . . . . . . . . . . . 21 ((∀𝑠 ∈ ((,) “ ((𝐴[,]𝐵) × (𝐴[,]𝐵)))(abs‘∫𝑠(𝐹𝑡) d𝑡) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝑠, (abs‘(𝐹𝑡)), 0))) ∧ (𝑢(,)𝑤) ∈ ((,) “ ((𝐴[,]𝐵) × (𝐴[,]𝐵)))) → (abs‘∫(𝑢(,)𝑤)(𝐹𝑡) d𝑡) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))))
352331, 343, 351syl2an 493 . . . . . . . . . . . . . . . . . . . 20 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (abs‘∫(𝑢(,)𝑤)(𝐹𝑡) d𝑡) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))))
3533523adantr3 1215 . . . . . . . . . . . . . . . . . . 19 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (abs‘∫(𝑢(,)𝑤)(𝐹𝑡) d𝑡) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))))
354330, 353eqbrtrd 4605 . . . . . . . . . . . . . . . . . 18 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (abs‘((𝐺𝑤) − (𝐺𝑢))) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))))
355354adantlr 747 . . . . . . . . . . . . . . . . 17 (((𝜑𝑦 ∈ ℝ+) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (abs‘((𝐺𝑤) − (𝐺𝑢))) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))))
356 subcl 10159 . . . . . . . . . . . . . . . . . . . . . . . 24 (((𝐺𝑤) ∈ ℂ ∧ (𝐺𝑢) ∈ ℂ) → ((𝐺𝑤) − (𝐺𝑢)) ∈ ℂ)
357127, 128, 356syl2anr 494 . . . . . . . . . . . . . . . . . . . . . . 23 (((𝜑𝑢 ∈ (𝐴[,]𝐵)) ∧ (𝜑𝑤 ∈ (𝐴[,]𝐵))) → ((𝐺𝑤) − (𝐺𝑢)) ∈ ℂ)
358357anandis 869 . . . . . . . . . . . . . . . . . . . . . 22 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → ((𝐺𝑤) − (𝐺𝑢)) ∈ ℂ)
359358abscld 14023 . . . . . . . . . . . . . . . . . . . . 21 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (abs‘((𝐺𝑤) − (𝐺𝑢))) ∈ ℝ)
360359rexrd 9968 . . . . . . . . . . . . . . . . . . . 20 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (abs‘((𝐺𝑤) − (𝐺𝑢))) ∈ ℝ*)
3613603adantr3 1215 . . . . . . . . . . . . . . . . . . 19 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (abs‘((𝐺𝑤) − (𝐺𝑢))) ∈ ℝ*)
362361adantlr 747 . . . . . . . . . . . . . . . . . 18 (((𝜑𝑦 ∈ ℝ+) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (abs‘((𝐺𝑤) − (𝐺𝑢))) ∈ ℝ*)
363167adantlr 747 . . . . . . . . . . . . . . . . . 18 (((𝜑𝑦 ∈ ℝ+) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))) ∈ ℝ*)
364213ad2antlr 759 . . . . . . . . . . . . . . . . . 18 (((𝜑𝑦 ∈ ℝ+) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → 𝑦 ∈ ℝ*)
365 xrlelttr 11863 . . . . . . . . . . . . . . . . . 18 (((abs‘((𝐺𝑤) − (𝐺𝑢))) ∈ ℝ* ∧ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))) ∈ ℝ*𝑦 ∈ ℝ*) → (((abs‘((𝐺𝑤) − (𝐺𝑢))) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))) ∧ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))) < 𝑦) → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
366362, 363, 364, 365syl3anc 1318 . . . . . . . . . . . . . . . . 17 (((𝜑𝑦 ∈ ℝ+) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (((abs‘((𝐺𝑤) − (𝐺𝑢))) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))) ∧ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))) < 𝑦) → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
367355, 366mpand 707 . . . . . . . . . . . . . . . 16 (((𝜑𝑦 ∈ ℝ+) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → ((∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))) < 𝑦 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
368256, 367sylanl1 680 . . . . . . . . . . . . . . 15 ((((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ 𝑦 ∈ ℝ+) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → ((∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))) < 𝑦 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
369368adantr 480 . . . . . . . . . . . . . 14 (((((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ 𝑦 ∈ ℝ+) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) ∧ (abs‘(𝑤𝑢)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < )))) → ((∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))) < 𝑦 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
370255, 369mpd 15 . . . . . . . . . . . . 13 (((((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ 𝑦 ∈ ℝ+) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) ∧ (abs‘(𝑤𝑢)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < )))) → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦)
371370ex 449 . . . . . . . . . . . 12 ((((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ 𝑦 ∈ ℝ+) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → ((abs‘(𝑤𝑢)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
372105, 115, 118, 134, 371wlogle 10440 . . . . . . . . . . 11 ((((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ 𝑦 ∈ ℝ+) ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → ((abs‘(𝑤𝑢)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
373372anassrs 678 . . . . . . . . . 10 (((((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ 𝑦 ∈ ℝ+) ∧ 𝑢 ∈ (𝐴[,]𝐵)) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → ((abs‘(𝑤𝑢)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
37495, 373sylanb 488 . . . . . . . . 9 ((((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → ((abs‘(𝑤𝑢)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
375374ralrimiva 2949 . . . . . . . 8 (((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) → ∀𝑤 ∈ (𝐴[,]𝐵)((abs‘(𝑤𝑢)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
376 breq2 4587 . . . . . . . . . . 11 (𝑧 = ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) → ((abs‘(𝑤𝑢)) < 𝑧 ↔ (abs‘(𝑤𝑢)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < )))))
377376imbi1d 330 . . . . . . . . . 10 (𝑧 = ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) → (((abs‘(𝑤𝑢)) < 𝑧 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦) ↔ ((abs‘(𝑤𝑢)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦)))
378377ralbidv 2969 . . . . . . . . 9 (𝑧 = ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) → (∀𝑤 ∈ (𝐴[,]𝐵)((abs‘(𝑤𝑢)) < 𝑧 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦) ↔ ∀𝑤 ∈ (𝐴[,]𝐵)((abs‘(𝑤𝑢)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦)))
379378rspcev 3282 . . . . . . . 8 ((((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) ∈ ℝ+ ∧ ∀𝑤 ∈ (𝐴[,]𝐵)((abs‘(𝑤𝑢)) < ((𝑦 / 2) / (2 · sup((abs “ (ran 𝑓 ∪ ran 𝑔)), ℝ, < ))) → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦)) → ∃𝑧 ∈ ℝ+𝑤 ∈ (𝐴[,]𝐵)((abs‘(𝑤𝑢)) < 𝑧 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
38084, 375, 379syl2anc 691 . . . . . . 7 (((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) → ∃𝑧 ∈ ℝ+𝑤 ∈ (𝐴[,]𝐵)((abs‘(𝑤𝑢)) < 𝑧 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
381 ralnex 2975 . . . . . . . . 9 (∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔) ¬ 𝑟 ≠ 0 ↔ ¬ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0)
382 nne 2786 . . . . . . . . . 10 𝑟 ≠ 0 ↔ 𝑟 = 0)
383382ralbii 2963 . . . . . . . . 9 (∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔) ¬ 𝑟 ≠ 0 ↔ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0)
384381, 383bitr3i 265 . . . . . . . 8 (¬ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0 ↔ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0)
385 ffn 5958 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 (𝑓:ℝ⟶ℝ → 𝑓 Fn ℝ)
38616, 385syl 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 (𝑓 ∈ dom ∫1𝑓 Fn ℝ)
387 fnfvelrn 6264 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 ((𝑓 Fn ℝ ∧ 𝑡 ∈ ℝ) → (𝑓𝑡) ∈ ran 𝑓)
388386, 387sylan 487 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ((𝑓 ∈ dom ∫1𝑡 ∈ ℝ) → (𝑓𝑡) ∈ ran 𝑓)
389 elun1 3742 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ((𝑓𝑡) ∈ ran 𝑓 → (𝑓𝑡) ∈ (ran 𝑓 ∪ ran 𝑔))
390388, 389syl 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ((𝑓 ∈ dom ∫1𝑡 ∈ ℝ) → (𝑓𝑡) ∈ (ran 𝑓 ∪ ran 𝑔))
391 eqeq1 2614 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 (𝑟 = (𝑓𝑡) → (𝑟 = 0 ↔ (𝑓𝑡) = 0))
392391rspcva 3280 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 (((𝑓𝑡) ∈ (ran 𝑓 ∪ ran 𝑔) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0) → (𝑓𝑡) = 0)
393390, 392sylan 487 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 (((𝑓 ∈ dom ∫1𝑡 ∈ ℝ) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0) → (𝑓𝑡) = 0)
394393adantllr 751 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ((((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0) → (𝑓𝑡) = 0)
395 ffn 5958 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 (𝑔:ℝ⟶ℝ → 𝑔 Fn ℝ)
39620, 395syl 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 (𝑔 ∈ dom ∫1𝑔 Fn ℝ)
397 fnfvelrn 6264 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 ((𝑔 Fn ℝ ∧ 𝑡 ∈ ℝ) → (𝑔𝑡) ∈ ran 𝑔)
398396, 397sylan 487 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ((𝑔 ∈ dom ∫1𝑡 ∈ ℝ) → (𝑔𝑡) ∈ ran 𝑔)
399 elun2 3743 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ((𝑔𝑡) ∈ ran 𝑔 → (𝑔𝑡) ∈ (ran 𝑓 ∪ ran 𝑔))
400398, 399syl 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ((𝑔 ∈ dom ∫1𝑡 ∈ ℝ) → (𝑔𝑡) ∈ (ran 𝑓 ∪ ran 𝑔))
401 eqeq1 2614 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 (𝑟 = (𝑔𝑡) → (𝑟 = 0 ↔ (𝑔𝑡) = 0))
402401rspcva 3280 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 (((𝑔𝑡) ∈ (ran 𝑓 ∪ ran 𝑔) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0) → (𝑔𝑡) = 0)
403402oveq2d 6565 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 (((𝑔𝑡) ∈ (ran 𝑓 ∪ ran 𝑔) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0) → (i · (𝑔𝑡)) = (i · 0))
404 it0e0 11131 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 (i · 0) = 0
405403, 404syl6eq 2660 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 (((𝑔𝑡) ∈ (ran 𝑓 ∪ ran 𝑔) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0) → (i · (𝑔𝑡)) = 0)
406400, 405sylan 487 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 (((𝑔 ∈ dom ∫1𝑡 ∈ ℝ) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0) → (i · (𝑔𝑡)) = 0)
407406adantlll 750 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ((((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0) → (i · (𝑔𝑡)) = 0)
408394, 407oveq12d 6567 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ((((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0) → ((𝑓𝑡) + (i · (𝑔𝑡))) = (0 + 0))
409408an32s 842 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0) ∧ 𝑡 ∈ ℝ) → ((𝑓𝑡) + (i · (𝑔𝑡))) = (0 + 0))
410 00id 10090 . . . . . . . . . . . . . . . . . . . . . . . . . 26 (0 + 0) = 0
411409, 410syl6eq 2660 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0) ∧ 𝑡 ∈ ℝ) → ((𝑓𝑡) + (i · (𝑔𝑡))) = 0)
412411adantlll 750 . . . . . . . . . . . . . . . . . . . . . . . 24 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0) ∧ 𝑡 ∈ ℝ) → ((𝑓𝑡) + (i · (𝑔𝑡))) = 0)
413412oveq2d 6565 . . . . . . . . . . . . . . . . . . . . . . 23 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0) ∧ 𝑡 ∈ ℝ) → (if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡)))) = (if(𝑡𝐷, (𝐹𝑡), 0) − 0))
414 0cnd 9912 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((𝜑 ∧ ¬ 𝑡𝐷) → 0 ∈ ℂ)
415151, 414ifclda 4070 . . . . . . . . . . . . . . . . . . . . . . . . 25 (𝜑 → if(𝑡𝐷, (𝐹𝑡), 0) ∈ ℂ)
416415subid1d 10260 . . . . . . . . . . . . . . . . . . . . . . . 24 (𝜑 → (if(𝑡𝐷, (𝐹𝑡), 0) − 0) = if(𝑡𝐷, (𝐹𝑡), 0))
417416ad3antrrr 762 . . . . . . . . . . . . . . . . . . . . . . 23 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0) ∧ 𝑡 ∈ ℝ) → (if(𝑡𝐷, (𝐹𝑡), 0) − 0) = if(𝑡𝐷, (𝐹𝑡), 0))
418413, 417eqtrd 2644 . . . . . . . . . . . . . . . . . . . . . 22 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0) ∧ 𝑡 ∈ ℝ) → (if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡)))) = if(𝑡𝐷, (𝐹𝑡), 0))
419418fveq2d 6107 . . . . . . . . . . . . . . . . . . . . 21 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0) ∧ 𝑡 ∈ ℝ) → (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))) = (abs‘if(𝑡𝐷, (𝐹𝑡), 0)))
420 fvif 6114 . . . . . . . . . . . . . . . . . . . . . 22 (abs‘if(𝑡𝐷, (𝐹𝑡), 0)) = if(𝑡𝐷, (abs‘(𝐹𝑡)), (abs‘0))
421 abs0 13873 . . . . . . . . . . . . . . . . . . . . . . 23 (abs‘0) = 0
422 ifeq2 4041 . . . . . . . . . . . . . . . . . . . . . . 23 ((abs‘0) = 0 → if(𝑡𝐷, (abs‘(𝐹𝑡)), (abs‘0)) = if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))
423421, 422ax-mp 5 . . . . . . . . . . . . . . . . . . . . . 22 if(𝑡𝐷, (abs‘(𝐹𝑡)), (abs‘0)) = if(𝑡𝐷, (abs‘(𝐹𝑡)), 0)
424420, 423eqtri 2632 . . . . . . . . . . . . . . . . . . . . 21 (abs‘if(𝑡𝐷, (𝐹𝑡), 0)) = if(𝑡𝐷, (abs‘(𝐹𝑡)), 0)
425419, 424syl6eq 2660 . . . . . . . . . . . . . . . . . . . 20 ((((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0) ∧ 𝑡 ∈ ℝ) → (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))) = if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))
426425mpteq2dva 4672 . . . . . . . . . . . . . . . . . . 19 (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0) → (𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡)))))) = (𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0)))
427426fveq2d 6107 . . . . . . . . . . . . . . . . . 18 (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) = (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))))
428427breq1d 4593 . . . . . . . . . . . . . . . . 17 (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0) → ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2) ↔ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2)))
429428biimpd 218 . . . . . . . . . . . . . . . 16 (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0) → ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2)))
430429ex 449 . . . . . . . . . . . . . . 15 ((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) → (∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0 → ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2))))
431430com23 84 . . . . . . . . . . . . . 14 ((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) → ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2) → (∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0 → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2))))
432431imp32 448 . . . . . . . . . . . . 13 (((𝜑 ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0)) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2))
433432anasss 677 . . . . . . . . . . . 12 ((𝜑 ∧ ((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0))) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2))
434433adantlr 747 . . . . . . . . . . 11 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ ((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0))) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2))
435 1rp 11712 . . . . . . . . . . . . 13 1 ∈ ℝ+
436435ne0ii 3882 . . . . . . . . . . . 12 + ≠ ∅
437358anassrs 678 . . . . . . . . . . . . . . . . . . 19 (((𝜑𝑢 ∈ (𝐴[,]𝐵)) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → ((𝐺𝑤) − (𝐺𝑢)) ∈ ℂ)
438437abscld 14023 . . . . . . . . . . . . . . . . . 18 (((𝜑𝑢 ∈ (𝐴[,]𝐵)) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → (abs‘((𝐺𝑤) − (𝐺𝑢))) ∈ ℝ)
439438adantlrr 753 . . . . . . . . . . . . . . . . 17 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → (abs‘((𝐺𝑤) − (𝐺𝑢))) ∈ ℝ)
440439adantlr 747 . . . . . . . . . . . . . . . 16 ((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2)) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → (abs‘((𝐺𝑤) − (𝐺𝑢))) ∈ ℝ)
441 rpre 11715 . . . . . . . . . . . . . . . . . . 19 (𝑦 ∈ ℝ+𝑦 ∈ ℝ)
442441rehalfcld 11156 . . . . . . . . . . . . . . . . . 18 (𝑦 ∈ ℝ+ → (𝑦 / 2) ∈ ℝ)
443442adantl 481 . . . . . . . . . . . . . . . . 17 ((𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+) → (𝑦 / 2) ∈ ℝ)
444443ad3antlr 763 . . . . . . . . . . . . . . . 16 ((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2)) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → (𝑦 / 2) ∈ ℝ)
445441adantl 481 . . . . . . . . . . . . . . . . 17 ((𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+) → 𝑦 ∈ ℝ)
446445ad3antlr 763 . . . . . . . . . . . . . . . 16 ((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2)) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → 𝑦 ∈ ℝ)
447440rexrd 9968 . . . . . . . . . . . . . . . . 17 ((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2)) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → (abs‘((𝐺𝑤) − (𝐺𝑢))) ∈ ℝ*)
448159a1i 11 . . . . . . . . . . . . . . . . . . . . . 22 ((𝜑 ∧ ¬ 𝑡𝐷) → 0 ∈ (0[,]+∞))
449156, 448ifclda 4070 . . . . . . . . . . . . . . . . . . . . 21 (𝜑 → if(𝑡𝐷, (abs‘(𝐹𝑡)), 0) ∈ (0[,]+∞))
450449adantr 480 . . . . . . . . . . . . . . . . . . . 20 ((𝜑𝑡 ∈ ℝ) → if(𝑡𝐷, (abs‘(𝐹𝑡)), 0) ∈ (0[,]+∞))
451 eqid 2610 . . . . . . . . . . . . . . . . . . . 20 (𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0)) = (𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))
452450, 451fmptd 6292 . . . . . . . . . . . . . . . . . . 19 (𝜑 → (𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0)):ℝ⟶(0[,]+∞))
453 itg2cl 23305 . . . . . . . . . . . . . . . . . . 19 ((𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0)):ℝ⟶(0[,]+∞) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) ∈ ℝ*)
454452, 453syl 17 . . . . . . . . . . . . . . . . . 18 (𝜑 → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) ∈ ℝ*)
455454ad3antrrr 762 . . . . . . . . . . . . . . . . 17 ((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2)) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) ∈ ℝ*)
456444rexrd 9968 . . . . . . . . . . . . . . . . 17 ((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2)) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → (𝑦 / 2) ∈ ℝ*)
457111, 110oveqan12rd 6569 . . . . . . . . . . . . . . . . . . . . . . 23 ((𝑏 = 𝑢𝑎 = 𝑤) → ((𝐺𝑎) − (𝐺𝑏)) = ((𝐺𝑤) − (𝐺𝑢)))
458457fveq2d 6107 . . . . . . . . . . . . . . . . . . . . . 22 ((𝑏 = 𝑢𝑎 = 𝑤) → (abs‘((𝐺𝑎) − (𝐺𝑏))) = (abs‘((𝐺𝑤) − (𝐺𝑢))))
459458breq1d 4593 . . . . . . . . . . . . . . . . . . . . 21 ((𝑏 = 𝑢𝑎 = 𝑤) → ((abs‘((𝐺𝑎) − (𝐺𝑏))) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) ↔ (abs‘((𝐺𝑤) − (𝐺𝑢))) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0)))))
460101, 100oveqan12rd 6569 . . . . . . . . . . . . . . . . . . . . . . 23 ((𝑏 = 𝑤𝑎 = 𝑢) → ((𝐺𝑎) − (𝐺𝑏)) = ((𝐺𝑢) − (𝐺𝑤)))
461460fveq2d 6107 . . . . . . . . . . . . . . . . . . . . . 22 ((𝑏 = 𝑤𝑎 = 𝑢) → (abs‘((𝐺𝑎) − (𝐺𝑏))) = (abs‘((𝐺𝑢) − (𝐺𝑤))))
462461breq1d 4593 . . . . . . . . . . . . . . . . . . . . 21 ((𝑏 = 𝑤𝑎 = 𝑢) → ((abs‘((𝐺𝑎) − (𝐺𝑏))) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) ↔ (abs‘((𝐺𝑢) − (𝐺𝑤))) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0)))))
463131breq1d 4593 . . . . . . . . . . . . . . . . . . . . 21 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → ((abs‘((𝐺𝑤) − (𝐺𝑢))) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) ↔ (abs‘((𝐺𝑢) − (𝐺𝑤))) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0)))))
464326abscld 14023 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (abs‘∫(𝑢(,)𝑤)(𝐹𝑡) d𝑡) ∈ ℝ)
465464rexrd 9968 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (abs‘∫(𝑢(,)𝑤)(𝐹𝑡) d𝑡) ∈ ℝ*)
466454adantr 480 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) ∈ ℝ*)
467452adantr 480 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0)):ℝ⟶(0[,]+∞))
468 breq2 4587 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ((abs‘(𝐹𝑡)) = if(𝑡𝐷, (abs‘(𝐹𝑡)), 0) → (if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ≤ (abs‘(𝐹𝑡)) ↔ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ≤ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0)))
469 breq2 4587 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (0 = if(𝑡𝐷, (abs‘(𝐹𝑡)), 0) → (if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ≤ 0 ↔ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ≤ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0)))
470152leidd 10473 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ((𝜑𝑡𝐷) → (abs‘(𝐹𝑡)) ≤ (abs‘(𝐹𝑡)))
471 breq1 4586 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 ((abs‘(𝐹𝑡)) = if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) → ((abs‘(𝐹𝑡)) ≤ (abs‘(𝐹𝑡)) ↔ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ≤ (abs‘(𝐹𝑡))))
472 breq1 4586 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 (0 = if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) → (0 ≤ (abs‘(𝐹𝑡)) ↔ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ≤ (abs‘(𝐹𝑡))))
473471, 472ifboth 4074 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 (((abs‘(𝐹𝑡)) ≤ (abs‘(𝐹𝑡)) ∧ 0 ≤ (abs‘(𝐹𝑡))) → if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ≤ (abs‘(𝐹𝑡)))
474470, 154, 473syl2anc 691 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ((𝜑𝑡𝐷) → if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ≤ (abs‘(𝐹𝑡)))
475474adantlr 747 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ 𝑡𝐷) → if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ≤ (abs‘(𝐹𝑡)))
476149ssneld 3570 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (¬ 𝑡𝐷 → ¬ 𝑡 ∈ (𝑢(,)𝑤)))
477476imp 444 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ ¬ 𝑡𝐷) → ¬ 𝑡 ∈ (𝑢(,)𝑤))
478230, 228syl6eqbr 4622 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 𝑡 ∈ (𝑢(,)𝑤) → if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ≤ 0)
479477, 478syl 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) ∧ ¬ 𝑡𝐷) → if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ≤ 0)
480468, 469, 475, 479ifbothda 4073 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ≤ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))
481480ralrimivw 2950 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → ∀𝑡 ∈ ℝ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ≤ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))
482237, 238ifex 4106 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 if(𝑡𝐷, (abs‘(𝐹𝑡)), 0) ∈ V
483482a1i 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ((𝜑𝑡 ∈ ℝ) → if(𝑡𝐷, (abs‘(𝐹𝑡)), 0) ∈ V)
484 eqidd 2611 . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 (𝜑 → (𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0)) = (𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0)))
485236, 240, 483, 244, 484ofrfval2 6813 . . . . . . . . . . . . . . . . . . . . . . . . . . 27 (𝜑 → ((𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0)) ∘𝑟 ≤ (𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0)) ↔ ∀𝑡 ∈ ℝ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ≤ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0)))
486485adantr 480 . . . . . . . . . . . . . . . . . . . . . . . . . 26 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → ((𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0)) ∘𝑟 ≤ (𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0)) ↔ ∀𝑡 ∈ ℝ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0) ≤ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0)))
487481, 486mpbird 246 . . . . . . . . . . . . . . . . . . . . . . . . 25 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0)) ∘𝑟 ≤ (𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0)))
488 itg2le 23312 . . . . . . . . . . . . . . . . . . . . . . . . 25 (((𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0)):ℝ⟶(0[,]+∞) ∧ (𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0)):ℝ⟶(0[,]+∞) ∧ (𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0)) ∘𝑟 ≤ (𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))))
489164, 467, 487, 488syl3anc 1318 . . . . . . . . . . . . . . . . . . . . . . . 24 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡 ∈ (𝑢(,)𝑤), (abs‘(𝐹𝑡)), 0))) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))))
490465, 166, 466, 352, 489xrletrd 11869 . . . . . . . . . . . . . . . . . . . . . . 23 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (abs‘∫(𝑢(,)𝑤)(𝐹𝑡) d𝑡) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))))
4914903adantr3 1215 . . . . . . . . . . . . . . . . . . . . . 22 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (abs‘∫(𝑢(,)𝑤)(𝐹𝑡) d𝑡) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))))
492330, 491eqbrtrd 4605 . . . . . . . . . . . . . . . . . . . . 21 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵) ∧ 𝑢𝑤)) → (abs‘((𝐺𝑤) − (𝐺𝑢))) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))))
493459, 462, 117, 463, 492wlogle 10440 . . . . . . . . . . . . . . . . . . . 20 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑤 ∈ (𝐴[,]𝐵))) → (abs‘((𝐺𝑤) − (𝐺𝑢))) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))))
494493anassrs 678 . . . . . . . . . . . . . . . . . . 19 (((𝜑𝑢 ∈ (𝐴[,]𝐵)) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → (abs‘((𝐺𝑤) − (𝐺𝑢))) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))))
495494adantlrr 753 . . . . . . . . . . . . . . . . . 18 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → (abs‘((𝐺𝑤) − (𝐺𝑢))) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))))
496495adantlr 747 . . . . . . . . . . . . . . . . 17 ((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2)) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → (abs‘((𝐺𝑤) − (𝐺𝑢))) ≤ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))))
497 simplr 788 . . . . . . . . . . . . . . . . 17 ((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2)) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2))
498447, 455, 456, 496, 497xrlelttrd 11867 . . . . . . . . . . . . . . . 16 ((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2)) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → (abs‘((𝐺𝑤) − (𝐺𝑢))) < (𝑦 / 2))
499 rphalflt 11736 . . . . . . . . . . . . . . . . . 18 (𝑦 ∈ ℝ+ → (𝑦 / 2) < 𝑦)
500499adantl 481 . . . . . . . . . . . . . . . . 17 ((𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+) → (𝑦 / 2) < 𝑦)
501500ad3antlr 763 . . . . . . . . . . . . . . . 16 ((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2)) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → (𝑦 / 2) < 𝑦)
502440, 444, 446, 498, 501lttrd 10077 . . . . . . . . . . . . . . 15 ((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2)) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦)
503502a1d 25 . . . . . . . . . . . . . 14 ((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2)) ∧ 𝑤 ∈ (𝐴[,]𝐵)) → ((abs‘(𝑤𝑢)) < 𝑧 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
504503ralrimiva 2949 . . . . . . . . . . . . 13 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2)) → ∀𝑤 ∈ (𝐴[,]𝐵)((abs‘(𝑤𝑢)) < 𝑧 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
505504ralrimivw 2950 . . . . . . . . . . . 12 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2)) → ∀𝑧 ∈ ℝ+𝑤 ∈ (𝐴[,]𝐵)((abs‘(𝑤𝑢)) < 𝑧 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
506 r19.2z 4012 . . . . . . . . . . . 12 ((ℝ+ ≠ ∅ ∧ ∀𝑧 ∈ ℝ+𝑤 ∈ (𝐴[,]𝐵)((abs‘(𝑤𝑢)) < 𝑧 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦)) → ∃𝑧 ∈ ℝ+𝑤 ∈ (𝐴[,]𝐵)((abs‘(𝑤𝑢)) < 𝑧 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
507436, 505, 506sylancr 694 . . . . . . . . . . 11 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ if(𝑡𝐷, (abs‘(𝐹𝑡)), 0))) < (𝑦 / 2)) → ∃𝑧 ∈ ℝ+𝑤 ∈ (𝐴[,]𝐵)((abs‘(𝑤𝑢)) < 𝑧 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
508434, 507syldan 486 . . . . . . . . . 10 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ ((𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1) ∧ ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0))) → ∃𝑧 ∈ ℝ+𝑤 ∈ (𝐴[,]𝐵)((abs‘(𝑤𝑢)) < 𝑧 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
509508anassrs 678 . . . . . . . . 9 ((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0)) → ∃𝑧 ∈ ℝ+𝑤 ∈ (𝐴[,]𝐵)((abs‘(𝑤𝑢)) < 𝑧 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
510509anassrs 678 . . . . . . . 8 (((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ∀𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 = 0) → ∃𝑧 ∈ ℝ+𝑤 ∈ (𝐴[,]𝐵)((abs‘(𝑤𝑢)) < 𝑧 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
511384, 510sylan2b 491 . . . . . . 7 (((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) ∧ ¬ ∃𝑟 ∈ (ran 𝑓 ∪ ran 𝑔)𝑟 ≠ 0) → ∃𝑧 ∈ ℝ+𝑤 ∈ (𝐴[,]𝐵)((abs‘(𝑤𝑢)) < 𝑧 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
512380, 511pm2.61dan 828 . . . . . 6 ((((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2)) → ∃𝑧 ∈ ℝ+𝑤 ∈ (𝐴[,]𝐵)((abs‘(𝑤𝑢)) < 𝑧 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
513512ex 449 . . . . 5 (((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) ∧ (𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1)) → ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2) → ∃𝑧 ∈ ℝ+𝑤 ∈ (𝐴[,]𝐵)((abs‘(𝑤𝑢)) < 𝑧 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦)))
514513rexlimdvva 3020 . . . 4 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) → (∃𝑓 ∈ dom ∫1𝑔 ∈ dom ∫1(∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡𝐷, (𝐹𝑡), 0) − ((𝑓𝑡) + (i · (𝑔𝑡))))))) < (𝑦 / 2) → ∃𝑧 ∈ ℝ+𝑤 ∈ (𝐴[,]𝐵)((abs‘(𝑤𝑢)) < 𝑧 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦)))
51513, 514mpd 15 . . 3 ((𝜑 ∧ (𝑢 ∈ (𝐴[,]𝐵) ∧ 𝑦 ∈ ℝ+)) → ∃𝑧 ∈ ℝ+𝑤 ∈ (𝐴[,]𝐵)((abs‘(𝑤𝑢)) < 𝑧 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
516515ralrimivva 2954 . 2 (𝜑 → ∀𝑢 ∈ (𝐴[,]𝐵)∀𝑦 ∈ ℝ+𝑧 ∈ ℝ+𝑤 ∈ (𝐴[,]𝐵)((abs‘(𝑤𝑢)) < 𝑧 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))
517 ssid 3587 . . 3 ℂ ⊆ ℂ
518 elcncf2 22501 . . 3 (((𝐴[,]𝐵) ⊆ ℂ ∧ ℂ ⊆ ℂ) → (𝐺 ∈ ((𝐴[,]𝐵)–cn→ℂ) ↔ (𝐺:(𝐴[,]𝐵)⟶ℂ ∧ ∀𝑢 ∈ (𝐴[,]𝐵)∀𝑦 ∈ ℝ+𝑧 ∈ ℝ+𝑤 ∈ (𝐴[,]𝐵)((abs‘(𝑤𝑢)) < 𝑧 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))))
519120, 517, 518sylancl 693 . 2 (𝜑 → (𝐺 ∈ ((𝐴[,]𝐵)–cn→ℂ) ↔ (𝐺:(𝐴[,]𝐵)⟶ℂ ∧ ∀𝑢 ∈ (𝐴[,]𝐵)∀𝑦 ∈ ℝ+𝑧 ∈ ℝ+𝑤 ∈ (𝐴[,]𝐵)((abs‘(𝑤𝑢)) < 𝑧 → (abs‘((𝐺𝑤) − (𝐺𝑢))) < 𝑦))))
5209, 516, 519mpbir2and 959 1 (𝜑𝐺 ∈ ((𝐴[,]𝐵)–cn→ℂ))
 Colors of variables: wff setvar class Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 195   ∧ wa 383   ∧ w3a 1031   = wceq 1475   ∈ wcel 1977   ≠ wne 2780  ∀wral 2896  ∃wrex 2897  Vcvv 3173   ∪ cun 3538   ⊆ wss 3540  ∅c0 3874  ifcif 4036  𝒫 cpw 4108  ⟨cop 4131   class class class wbr 4583   ↦ cmpt 4643   × cxp 5036  dom cdm 5038  ran crn 5039   “ cima 5041  Fun wfun 5798   Fn wfn 5799  ⟶wf 5800  ‘cfv 5804  (class class class)co 6549   ∘𝑟 cofr 6794  Fincfn 7841  supcsup 8229  ℂcc 9813  ℝcr 9814  0cc0 9815  1c1 9816  ici 9817   + caddc 9818   · cmul 9820  +∞cpnf 9950  ℝ*cxr 9952   < clt 9953   ≤ cle 9954   − cmin 10145   / cdiv 10563  2c2 10947  ℝ+crp 11708  (,)cioo 12046  [,]cicc 12049  abscabs 13822  –cn→ccncf 22487  volcvol 23039  ∫1citg1 23190  ∫2citg2 23191  𝐿1cibl 23192  ∫citg 23193 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-rep 4699  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-inf2 8421  ax-cnex 9871  ax-resscn 9872  ax-1cn 9873  ax-icn 9874  ax-addcl 9875  ax-addrcl 9876  ax-mulcl 9877  ax-mulrcl 9878  ax-mulcom 9879  ax-addass 9880  ax-mulass 9881  ax-distr 9882  ax-i2m1 9883  ax-1ne0 9884  ax-1rid 9885  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888  ax-pre-lttri 9889  ax-pre-lttrn 9890  ax-pre-ltadd 9891  ax-pre-mulgt0 9892  ax-pre-sup 9893  ax-addf 9894 This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-fal 1481  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-reu 2903  df-rmo 2904  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-pss 3556  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-tp 4130  df-op 4132  df-uni 4373  df-int 4411  df-iun 4457  df-disj 4554  df-br 4584  df-opab 4644  df-mpt 4645  df-tr 4681  df-eprel 4949  df-id 4953  df-po 4959  df-so 4960  df-fr 4997  df-se 4998  df-we 4999  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-pred 5597  df-ord 5643  df-on 5644  df-lim 5645  df-suc 5646  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-isom 5813  df-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-of 6795  df-ofr 6796  df-om 6958  df-1st 7059  df-2nd 7060  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-1o 7447  df-2o 7448  df-oadd 7451  df-er 7629  df-map 7746  df-pm 7747  df-en 7842  df-dom 7843  df-sdom 7844  df-fin 7845  df-fi 8200  df-sup 8231  df-inf 8232  df-oi 8298  df-card 8648  df-cda 8873  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-sub 10147  df-neg 10148  df-div 10564  df-nn 10898  df-2 10956  df-3 10957  df-4 10958  df-n0 11170  df-z 11255  df-uz 11564  df-q 11665  df-rp 11709  df-xneg 11822  df-xadd 11823  df-xmul 11824  df-ioo 12050  df-ico 12052  df-icc 12053  df-fz 12198  df-fzo 12335  df-fl 12455  df-mod 12531  df-seq 12664  df-exp 12723  df-hash 12980  df-cj 13687  df-re 13688  df-im 13689  df-sqrt 13823  df-abs 13824  df-clim 14067  df-rlim 14068  df-sum 14265  df-rest 15906  df-topgen 15927  df-psmet 19559  df-xmet 19560  df-met 19561  df-bl 19562  df-mopn 19563  df-top 20521  df-bases 20522  df-topon 20523  df-cmp 21000  df-cncf 22489  df-ovol 23040  df-vol 23041  df-mbf 23194  df-itg1 23195  df-itg2 23196  df-ibl 23197  df-itg 23198  df-0p 23243 This theorem is referenced by:  ftc2nc  32664
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