Theorem ftc1anclem6 32660

Description: Lemma for ftc1anc 32663- construction of simple functions within an arbitrary absolute distance of the given function. Similar to Lemma 565Ib of [Fremlin5] p. 218, but without Fremlin's additional step of converting the simple function into a continuous one, which is unnecessary to this lemma's use; also, two simple functions are used to allow for complex-valued 𝐹. (Contributed by Brendan Leahy, 31-May-2018.)

Hypotheses

Ref	Expression
ftc1anc.g	⊢ 𝐺 = (𝑥 ∈ (𝐴[,]𝐵) ↦ ∫(𝐴(,)𝑥)(𝐹‘𝑡) d𝑡)
ftc1anc.a	⊢ (𝜑 → 𝐴 ∈ ℝ)
ftc1anc.b	⊢ (𝜑 → 𝐵 ∈ ℝ)
ftc1anc.le	⊢ (𝜑 → 𝐴 ≤ 𝐵)
ftc1anc.s	⊢ (𝜑 → (𝐴(,)𝐵) ⊆ 𝐷)
ftc1anc.d	⊢ (𝜑 → 𝐷 ⊆ ℝ)
ftc1anc.i	⊢ (𝜑 → 𝐹 ∈ 𝐿1)
ftc1anc.f	⊢ (𝜑 → 𝐹:𝐷⟶ℂ)

Assertion

Ref	Expression
ftc1anclem6	⊢ ((𝜑 ∧ 𝑌 ∈ ℝ+) → ∃𝑓 ∈ dom ∫1∃𝑔 ∈ dom ∫1(∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) − ((𝑓‘𝑡) + (i · (𝑔‘𝑡))))))) < 𝑌)

Distinct variable groups:   𝑓,𝑔,𝑡,𝑥,𝐴   𝐵,𝑓,𝑔,𝑡,𝑥   𝐷,𝑓,𝑔,𝑡,𝑥   𝑓,𝐹,𝑔,𝑡,𝑥   𝜑,𝑓,𝑔,𝑡,𝑥   𝑓,𝐺,𝑔   𝑓,𝑌,𝑔,𝑡,𝑥

Allowed substitution hints:   𝐺(𝑥,𝑡)

Proof of Theorem ftc1anclem6

Dummy variable 𝑦 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		rphalfcl 11734	. . 3 ⊢ (𝑌 ∈ ℝ+ → (𝑌 / 2) ∈ ℝ+)
2		ftc1anc.g	. . . 4 ⊢ 𝐺 = (𝑥 ∈ (𝐴[,]𝐵) ↦ ∫(𝐴(,)𝑥)(𝐹‘𝑡) d𝑡)
3		ftc1anc.a	. . . 4 ⊢ (𝜑 → 𝐴 ∈ ℝ)
4		ftc1anc.b	. . . 4 ⊢ (𝜑 → 𝐵 ∈ ℝ)
5		ftc1anc.le	. . . 4 ⊢ (𝜑 → 𝐴 ≤ 𝐵)
6		ftc1anc.s	. . . 4 ⊢ (𝜑 → (𝐴(,)𝐵) ⊆ 𝐷)
7		ftc1anc.d	. . . 4 ⊢ (𝜑 → 𝐷 ⊆ ℝ)
8		ftc1anc.i	. . . 4 ⊢ (𝜑 → 𝐹 ∈ 𝐿1)
9		ftc1anc.f	. . . 4 ⊢ (𝜑 → 𝐹:𝐷⟶ℂ)
10	2, 3, 4, 5, 6, 7, 8, 9	ftc1anclem5 32659	. . 3 ⊢ ((𝜑 ∧ (𝑌 / 2) ∈ ℝ+) → ∃𝑓 ∈ dom ∫1(∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) < (𝑌 / 2))
11	1, 10	sylan2 490	. 2 ⊢ ((𝜑 ∧ 𝑌 ∈ ℝ+) → ∃𝑓 ∈ dom ∫1(∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) < (𝑌 / 2))
12		eqid 2610	. . . . 5 ⊢ (𝑥 ∈ (𝐴[,]𝐵) ↦ ∫(𝐴(,)𝑥)((𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦)))‘𝑡) d𝑡) = (𝑥 ∈ (𝐴[,]𝐵) ↦ ∫(𝐴(,)𝑥)((𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦)))‘𝑡) d𝑡)
13		ax-icn 9874	. . . . . . . 8 ⊢ i ∈ ℂ
14		ine0 10344	. . . . . . . 8 ⊢ i ≠ 0
15	13, 14	reccli 10634	. . . . . . 7 ⊢ (1 / i) ∈ ℂ
16	15	a1i 11	. . . . . 6 ⊢ (𝜑 → (1 / i) ∈ ℂ)
17	9	ffvelrnda 6267	. . . . . 6 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐷) → (𝐹‘𝑦) ∈ ℂ)
18	9	feqmptd 6159	. . . . . . 7 ⊢ (𝜑 → 𝐹 = (𝑦 ∈ 𝐷 ↦ (𝐹‘𝑦)))
19	18, 8	eqeltrrd 2689	. . . . . 6 ⊢ (𝜑 → (𝑦 ∈ 𝐷 ↦ (𝐹‘𝑦)) ∈ 𝐿1)
20		divrec2 10581	. . . . . . . . . 10 ⊢ (((𝐹‘𝑦) ∈ ℂ ∧ i ∈ ℂ ∧ i ≠ 0) → ((𝐹‘𝑦) / i) = ((1 / i) · (𝐹‘𝑦)))
21	13, 14, 20	mp3an23 1408	. . . . . . . . 9 ⊢ ((𝐹‘𝑦) ∈ ℂ → ((𝐹‘𝑦) / i) = ((1 / i) · (𝐹‘𝑦)))
22	17, 21	syl 17	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐷) → ((𝐹‘𝑦) / i) = ((1 / i) · (𝐹‘𝑦)))
23	22	mpteq2dva 4672	. . . . . . 7 ⊢ (𝜑 → (𝑦 ∈ 𝐷 ↦ ((𝐹‘𝑦) / i)) = (𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦))))
24		iblmbf 23340	. . . . . . . . 9 ⊢ ((𝑦 ∈ 𝐷 ↦ (𝐹‘𝑦)) ∈ 𝐿1 → (𝑦 ∈ 𝐷 ↦ (𝐹‘𝑦)) ∈ MblFn)
25	19, 24	syl 17	. . . . . . . 8 ⊢ (𝜑 → (𝑦 ∈ 𝐷 ↦ (𝐹‘𝑦)) ∈ MblFn)
26		fveq2 6103	. . . . . . . . . . . . . . . . 17 ⊢ (𝑦 = 𝑥 → (𝐹‘𝑦) = (𝐹‘𝑥))
27	26	fveq2d 6107	. . . . . . . . . . . . . . . 16 ⊢ (𝑦 = 𝑥 → (ℜ‘(𝐹‘𝑦)) = (ℜ‘(𝐹‘𝑥)))
28	27	cbvmptv 4678	. . . . . . . . . . . . . . 15 ⊢ (𝑦 ∈ 𝐷 ↦ (ℜ‘(𝐹‘𝑦))) = (𝑥 ∈ 𝐷 ↦ (ℜ‘(𝐹‘𝑥)))
29	28	eleq1i 2679	. . . . . . . . . . . . . 14 ⊢ ((𝑦 ∈ 𝐷 ↦ (ℜ‘(𝐹‘𝑦))) ∈ MblFn ↔ (𝑥 ∈ 𝐷 ↦ (ℜ‘(𝐹‘𝑥))) ∈ MblFn)
30	17	recld 13782	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐷) → (ℜ‘(𝐹‘𝑦)) ∈ ℝ)
31	30	recnd 9947	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐷) → (ℜ‘(𝐹‘𝑦)) ∈ ℂ)
32	31	adantlr 747	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ (𝑥 ∈ 𝐷 ↦ (ℜ‘(𝐹‘𝑥))) ∈ MblFn) ∧ 𝑦 ∈ 𝐷) → (ℜ‘(𝐹‘𝑦)) ∈ ℂ)
33	29	biimpri 217	. . . . . . . . . . . . . . . 16 ⊢ ((𝑥 ∈ 𝐷 ↦ (ℜ‘(𝐹‘𝑥))) ∈ MblFn → (𝑦 ∈ 𝐷 ↦ (ℜ‘(𝐹‘𝑦))) ∈ MblFn)
34	33	adantl 481	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐷 ↦ (ℜ‘(𝐹‘𝑥))) ∈ MblFn) → (𝑦 ∈ 𝐷 ↦ (ℜ‘(𝐹‘𝑦))) ∈ MblFn)
35	32, 34	mbfneg 23223	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝐷 ↦ (ℜ‘(𝐹‘𝑥))) ∈ MblFn) → (𝑦 ∈ 𝐷 ↦ -(ℜ‘(𝐹‘𝑦))) ∈ MblFn)
36	29, 35	sylan2b 491	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝐷 ↦ (ℜ‘(𝐹‘𝑦))) ∈ MblFn) → (𝑦 ∈ 𝐷 ↦ -(ℜ‘(𝐹‘𝑦))) ∈ MblFn)
37	9	ffvelrnda 6267	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → (𝐹‘𝑥) ∈ ℂ)
38	37	recld 13782	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → (ℜ‘(𝐹‘𝑥)) ∈ ℝ)
39	38	recnd 9947	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → (ℜ‘(𝐹‘𝑥)) ∈ ℂ)
40	39	negnegd 10262	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → --(ℜ‘(𝐹‘𝑥)) = (ℜ‘(𝐹‘𝑥)))
41	40	mpteq2dva 4672	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → (𝑥 ∈ 𝐷 ↦ --(ℜ‘(𝐹‘𝑥))) = (𝑥 ∈ 𝐷 ↦ (ℜ‘(𝐹‘𝑥))))
42	41, 28	syl6eqr 2662	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (𝑥 ∈ 𝐷 ↦ --(ℜ‘(𝐹‘𝑥))) = (𝑦 ∈ 𝐷 ↦ (ℜ‘(𝐹‘𝑦))))
43	42	adantr 480	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝐷 ↦ -(ℜ‘(𝐹‘𝑦))) ∈ MblFn) → (𝑥 ∈ 𝐷 ↦ --(ℜ‘(𝐹‘𝑥))) = (𝑦 ∈ 𝐷 ↦ (ℜ‘(𝐹‘𝑦))))
44		negex 10158	. . . . . . . . . . . . . . . 16 ⊢ -(ℜ‘(𝐹‘𝑥)) ∈ V
45	44	a1i 11	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ (𝑦 ∈ 𝐷 ↦ -(ℜ‘(𝐹‘𝑦))) ∈ MblFn) ∧ 𝑥 ∈ 𝐷) → -(ℜ‘(𝐹‘𝑥)) ∈ V)
46	27	negeqd 10154	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑦 = 𝑥 → -(ℜ‘(𝐹‘𝑦)) = -(ℜ‘(𝐹‘𝑥)))
47	46	cbvmptv 4678	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑦 ∈ 𝐷 ↦ -(ℜ‘(𝐹‘𝑦))) = (𝑥 ∈ 𝐷 ↦ -(ℜ‘(𝐹‘𝑥)))
48	47	eleq1i 2679	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑦 ∈ 𝐷 ↦ -(ℜ‘(𝐹‘𝑦))) ∈ MblFn ↔ (𝑥 ∈ 𝐷 ↦ -(ℜ‘(𝐹‘𝑥))) ∈ MblFn)
49	48	biimpi 205	. . . . . . . . . . . . . . . 16 ⊢ ((𝑦 ∈ 𝐷 ↦ -(ℜ‘(𝐹‘𝑦))) ∈ MblFn → (𝑥 ∈ 𝐷 ↦ -(ℜ‘(𝐹‘𝑥))) ∈ MblFn)
50	49	adantl 481	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝐷 ↦ -(ℜ‘(𝐹‘𝑦))) ∈ MblFn) → (𝑥 ∈ 𝐷 ↦ -(ℜ‘(𝐹‘𝑥))) ∈ MblFn)
51	45, 50	mbfneg 23223	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝐷 ↦ -(ℜ‘(𝐹‘𝑦))) ∈ MblFn) → (𝑥 ∈ 𝐷 ↦ --(ℜ‘(𝐹‘𝑥))) ∈ MblFn)
52	43, 51	eqeltrrd 2689	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝐷 ↦ -(ℜ‘(𝐹‘𝑦))) ∈ MblFn) → (𝑦 ∈ 𝐷 ↦ (ℜ‘(𝐹‘𝑦))) ∈ MblFn)
53	36, 52	impbida 873	. . . . . . . . . . . 12 ⊢ (𝜑 → ((𝑦 ∈ 𝐷 ↦ (ℜ‘(𝐹‘𝑦))) ∈ MblFn ↔ (𝑦 ∈ 𝐷 ↦ -(ℜ‘(𝐹‘𝑦))) ∈ MblFn))
54		divcl 10570	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝐹‘𝑦) ∈ ℂ ∧ i ∈ ℂ ∧ i ≠ 0) → ((𝐹‘𝑦) / i) ∈ ℂ)
55		imre 13696	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝐹‘𝑦) / i) ∈ ℂ → (ℑ‘((𝐹‘𝑦) / i)) = (ℜ‘(-i · ((𝐹‘𝑦) / i))))
56	54, 55	syl 17	. . . . . . . . . . . . . . . . 17 ⊢ (((𝐹‘𝑦) ∈ ℂ ∧ i ∈ ℂ ∧ i ≠ 0) → (ℑ‘((𝐹‘𝑦) / i)) = (ℜ‘(-i · ((𝐹‘𝑦) / i))))
57	13, 14, 56	mp3an23 1408	. . . . . . . . . . . . . . . 16 ⊢ ((𝐹‘𝑦) ∈ ℂ → (ℑ‘((𝐹‘𝑦) / i)) = (ℜ‘(-i · ((𝐹‘𝑦) / i))))
58	13, 14, 54	mp3an23 1408	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐹‘𝑦) ∈ ℂ → ((𝐹‘𝑦) / i) ∈ ℂ)
59		mulneg1 10345	. . . . . . . . . . . . . . . . . . 19 ⊢ ((i ∈ ℂ ∧ ((𝐹‘𝑦) / i) ∈ ℂ) → (-i · ((𝐹‘𝑦) / i)) = -(i · ((𝐹‘𝑦) / i)))
60	13, 58, 59	sylancr 694	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐹‘𝑦) ∈ ℂ → (-i · ((𝐹‘𝑦) / i)) = -(i · ((𝐹‘𝑦) / i)))
61		divcan2 10572	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((𝐹‘𝑦) ∈ ℂ ∧ i ∈ ℂ ∧ i ≠ 0) → (i · ((𝐹‘𝑦) / i)) = (𝐹‘𝑦))
62	13, 14, 61	mp3an23 1408	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝐹‘𝑦) ∈ ℂ → (i · ((𝐹‘𝑦) / i)) = (𝐹‘𝑦))
63	62	negeqd 10154	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝐹‘𝑦) ∈ ℂ → -(i · ((𝐹‘𝑦) / i)) = -(𝐹‘𝑦))
64	60, 63	eqtrd 2644	. . . . . . . . . . . . . . . . 17 ⊢ ((𝐹‘𝑦) ∈ ℂ → (-i · ((𝐹‘𝑦) / i)) = -(𝐹‘𝑦))
65	64	fveq2d 6107	. . . . . . . . . . . . . . . 16 ⊢ ((𝐹‘𝑦) ∈ ℂ → (ℜ‘(-i · ((𝐹‘𝑦) / i))) = (ℜ‘-(𝐹‘𝑦)))
66		reneg 13713	. . . . . . . . . . . . . . . 16 ⊢ ((𝐹‘𝑦) ∈ ℂ → (ℜ‘-(𝐹‘𝑦)) = -(ℜ‘(𝐹‘𝑦)))
67	57, 65, 66	3eqtrd 2648	. . . . . . . . . . . . . . 15 ⊢ ((𝐹‘𝑦) ∈ ℂ → (ℑ‘((𝐹‘𝑦) / i)) = -(ℜ‘(𝐹‘𝑦)))
68	17, 67	syl 17	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐷) → (ℑ‘((𝐹‘𝑦) / i)) = -(ℜ‘(𝐹‘𝑦)))
69	68	mpteq2dva 4672	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑦 ∈ 𝐷 ↦ (ℑ‘((𝐹‘𝑦) / i))) = (𝑦 ∈ 𝐷 ↦ -(ℜ‘(𝐹‘𝑦))))
70	69	eleq1d 2672	. . . . . . . . . . . 12 ⊢ (𝜑 → ((𝑦 ∈ 𝐷 ↦ (ℑ‘((𝐹‘𝑦) / i))) ∈ MblFn ↔ (𝑦 ∈ 𝐷 ↦ -(ℜ‘(𝐹‘𝑦))) ∈ MblFn))
71	53, 70	bitr4d 270	. . . . . . . . . . 11 ⊢ (𝜑 → ((𝑦 ∈ 𝐷 ↦ (ℜ‘(𝐹‘𝑦))) ∈ MblFn ↔ (𝑦 ∈ 𝐷 ↦ (ℑ‘((𝐹‘𝑦) / i))) ∈ MblFn))
72		imval 13695	. . . . . . . . . . . . . 14 ⊢ ((𝐹‘𝑦) ∈ ℂ → (ℑ‘(𝐹‘𝑦)) = (ℜ‘((𝐹‘𝑦) / i)))
73	17, 72	syl 17	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐷) → (ℑ‘(𝐹‘𝑦)) = (ℜ‘((𝐹‘𝑦) / i)))
74	73	mpteq2dva 4672	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝑦 ∈ 𝐷 ↦ (ℑ‘(𝐹‘𝑦))) = (𝑦 ∈ 𝐷 ↦ (ℜ‘((𝐹‘𝑦) / i))))
75	74	eleq1d 2672	. . . . . . . . . . 11 ⊢ (𝜑 → ((𝑦 ∈ 𝐷 ↦ (ℑ‘(𝐹‘𝑦))) ∈ MblFn ↔ (𝑦 ∈ 𝐷 ↦ (ℜ‘((𝐹‘𝑦) / i))) ∈ MblFn))
76	71, 75	anbi12d 743	. . . . . . . . . 10 ⊢ (𝜑 → (((𝑦 ∈ 𝐷 ↦ (ℜ‘(𝐹‘𝑦))) ∈ MblFn ∧ (𝑦 ∈ 𝐷 ↦ (ℑ‘(𝐹‘𝑦))) ∈ MblFn) ↔ ((𝑦 ∈ 𝐷 ↦ (ℑ‘((𝐹‘𝑦) / i))) ∈ MblFn ∧ (𝑦 ∈ 𝐷 ↦ (ℜ‘((𝐹‘𝑦) / i))) ∈ MblFn)))
77		ancom 465	. . . . . . . . . 10 ⊢ (((𝑦 ∈ 𝐷 ↦ (ℑ‘((𝐹‘𝑦) / i))) ∈ MblFn ∧ (𝑦 ∈ 𝐷 ↦ (ℜ‘((𝐹‘𝑦) / i))) ∈ MblFn) ↔ ((𝑦 ∈ 𝐷 ↦ (ℜ‘((𝐹‘𝑦) / i))) ∈ MblFn ∧ (𝑦 ∈ 𝐷 ↦ (ℑ‘((𝐹‘𝑦) / i))) ∈ MblFn))
78	76, 77	syl6bb 275	. . . . . . . . 9 ⊢ (𝜑 → (((𝑦 ∈ 𝐷 ↦ (ℜ‘(𝐹‘𝑦))) ∈ MblFn ∧ (𝑦 ∈ 𝐷 ↦ (ℑ‘(𝐹‘𝑦))) ∈ MblFn) ↔ ((𝑦 ∈ 𝐷 ↦ (ℜ‘((𝐹‘𝑦) / i))) ∈ MblFn ∧ (𝑦 ∈ 𝐷 ↦ (ℑ‘((𝐹‘𝑦) / i))) ∈ MblFn)))
79	17	ismbfcn2 23212	. . . . . . . . 9 ⊢ (𝜑 → ((𝑦 ∈ 𝐷 ↦ (𝐹‘𝑦)) ∈ MblFn ↔ ((𝑦 ∈ 𝐷 ↦ (ℜ‘(𝐹‘𝑦))) ∈ MblFn ∧ (𝑦 ∈ 𝐷 ↦ (ℑ‘(𝐹‘𝑦))) ∈ MblFn)))
80	17, 58	syl 17	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐷) → ((𝐹‘𝑦) / i) ∈ ℂ)
81	80	ismbfcn2 23212	. . . . . . . . 9 ⊢ (𝜑 → ((𝑦 ∈ 𝐷 ↦ ((𝐹‘𝑦) / i)) ∈ MblFn ↔ ((𝑦 ∈ 𝐷 ↦ (ℜ‘((𝐹‘𝑦) / i))) ∈ MblFn ∧ (𝑦 ∈ 𝐷 ↦ (ℑ‘((𝐹‘𝑦) / i))) ∈ MblFn)))
82	78, 79, 81	3bitr4d 299	. . . . . . . 8 ⊢ (𝜑 → ((𝑦 ∈ 𝐷 ↦ (𝐹‘𝑦)) ∈ MblFn ↔ (𝑦 ∈ 𝐷 ↦ ((𝐹‘𝑦) / i)) ∈ MblFn))
83	25, 82	mpbid 221	. . . . . . 7 ⊢ (𝜑 → (𝑦 ∈ 𝐷 ↦ ((𝐹‘𝑦) / i)) ∈ MblFn)
84	23, 83	eqeltrrd 2689	. . . . . 6 ⊢ (𝜑 → (𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦))) ∈ MblFn)
85	16, 17, 19, 84	iblmulc2nc 32645	. . . . 5 ⊢ (𝜑 → (𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦))) ∈ 𝐿1)
86		mulcl 9899	. . . . . . 7 ⊢ (((1 / i) ∈ ℂ ∧ (𝐹‘𝑦) ∈ ℂ) → ((1 / i) · (𝐹‘𝑦)) ∈ ℂ)
87	15, 17, 86	sylancr 694	. . . . . 6 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐷) → ((1 / i) · (𝐹‘𝑦)) ∈ ℂ)
88		eqid 2610	. . . . . 6 ⊢ (𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦))) = (𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦)))
89	87, 88	fmptd 6292	. . . . 5 ⊢ (𝜑 → (𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦))):𝐷⟶ℂ)
90	12, 3, 4, 5, 6, 7, 85, 89	ftc1anclem5 32659	. . . 4 ⊢ ((𝜑 ∧ (𝑌 / 2) ∈ ℝ+) → ∃𝑔 ∈ dom ∫1(∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, ((𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦)))‘𝑡), 0)) − (𝑔‘𝑡))))) < (𝑌 / 2))
91	1, 90	sylan2 490	. . 3 ⊢ ((𝜑 ∧ 𝑌 ∈ ℝ+) → ∃𝑔 ∈ dom ∫1(∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, ((𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦)))‘𝑡), 0)) − (𝑔‘𝑡))))) < (𝑌 / 2))
92	9	ffvelrnda 6267	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝐷) → (𝐹‘𝑡) ∈ ℂ)
93		0cnd 9912	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ ¬ 𝑡 ∈ 𝐷) → 0 ∈ ℂ)
94	92, 93	ifclda 4070	. . . . . . . . . . . 12 ⊢ (𝜑 → if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) ∈ ℂ)
95		imval 13695	. . . . . . . . . . . 12 ⊢ (if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) ∈ ℂ → (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) = (ℜ‘(if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) / i)))
96	94, 95	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) = (ℜ‘(if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) / i)))
97		fveq2 6103	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑦 = 𝑡 → (𝐹‘𝑦) = (𝐹‘𝑡))
98	97	oveq2d 6565	. . . . . . . . . . . . . . . . 17 ⊢ (𝑦 = 𝑡 → ((1 / i) · (𝐹‘𝑦)) = ((1 / i) · (𝐹‘𝑡)))
99		ovex 6577	. . . . . . . . . . . . . . . . 17 ⊢ ((1 / i) · (𝐹‘𝑡)) ∈ V
100	98, 88, 99	fvmpt 6191	. . . . . . . . . . . . . . . 16 ⊢ (𝑡 ∈ 𝐷 → ((𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦)))‘𝑡) = ((1 / i) · (𝐹‘𝑡)))
101	100	adantl 481	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝐷) → ((𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦)))‘𝑡) = ((1 / i) · (𝐹‘𝑡)))
102		divrec2 10581	. . . . . . . . . . . . . . . . 17 ⊢ (((𝐹‘𝑡) ∈ ℂ ∧ i ∈ ℂ ∧ i ≠ 0) → ((𝐹‘𝑡) / i) = ((1 / i) · (𝐹‘𝑡)))
103	13, 14, 102	mp3an23 1408	. . . . . . . . . . . . . . . 16 ⊢ ((𝐹‘𝑡) ∈ ℂ → ((𝐹‘𝑡) / i) = ((1 / i) · (𝐹‘𝑡)))
104	92, 103	syl 17	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝐷) → ((𝐹‘𝑡) / i) = ((1 / i) · (𝐹‘𝑡)))
105	101, 104	eqtr4d 2647	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝐷) → ((𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦)))‘𝑡) = ((𝐹‘𝑡) / i))
106	105	ifeq1da 4066	. . . . . . . . . . . . 13 ⊢ (𝜑 → if(𝑡 ∈ 𝐷, ((𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦)))‘𝑡), 0) = if(𝑡 ∈ 𝐷, ((𝐹‘𝑡) / i), 0))
107		ovif 6635	. . . . . . . . . . . . . 14 ⊢ (if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) / i) = if(𝑡 ∈ 𝐷, ((𝐹‘𝑡) / i), (0 / i))
108	13, 14	div0i 10638	. . . . . . . . . . . . . . 15 ⊢ (0 / i) = 0
109		ifeq2 4041	. . . . . . . . . . . . . . 15 ⊢ ((0 / i) = 0 → if(𝑡 ∈ 𝐷, ((𝐹‘𝑡) / i), (0 / i)) = if(𝑡 ∈ 𝐷, ((𝐹‘𝑡) / i), 0))
110	108, 109	ax-mp 5	. . . . . . . . . . . . . 14 ⊢ if(𝑡 ∈ 𝐷, ((𝐹‘𝑡) / i), (0 / i)) = if(𝑡 ∈ 𝐷, ((𝐹‘𝑡) / i), 0)
111	107, 110	eqtri 2632	. . . . . . . . . . . . 13 ⊢ (if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) / i) = if(𝑡 ∈ 𝐷, ((𝐹‘𝑡) / i), 0)
112	106, 111	syl6eqr 2662	. . . . . . . . . . . 12 ⊢ (𝜑 → if(𝑡 ∈ 𝐷, ((𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦)))‘𝑡), 0) = (if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) / i))
113	112	fveq2d 6107	. . . . . . . . . . 11 ⊢ (𝜑 → (ℜ‘if(𝑡 ∈ 𝐷, ((𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦)))‘𝑡), 0)) = (ℜ‘(if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) / i)))
114	96, 113	eqtr4d 2647	. . . . . . . . . 10 ⊢ (𝜑 → (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) = (ℜ‘if(𝑡 ∈ 𝐷, ((𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦)))‘𝑡), 0)))
115	114	oveq1d 6564	. . . . . . . . 9 ⊢ (𝜑 → ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)) = ((ℜ‘if(𝑡 ∈ 𝐷, ((𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦)))‘𝑡), 0)) − (𝑔‘𝑡)))
116	115	fveq2d 6107	. . . . . . . 8 ⊢ (𝜑 → (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))) = (abs‘((ℜ‘if(𝑡 ∈ 𝐷, ((𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦)))‘𝑡), 0)) − (𝑔‘𝑡))))
117	116	mpteq2dv 4673	. . . . . . 7 ⊢ (𝜑 → (𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))) = (𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, ((𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦)))‘𝑡), 0)) − (𝑔‘𝑡)))))
118	117	fveq2d 6107	. . . . . 6 ⊢ (𝜑 → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) = (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, ((𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦)))‘𝑡), 0)) − (𝑔‘𝑡))))))
119	118	breq1d 4593	. . . . 5 ⊢ (𝜑 → ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) < (𝑌 / 2) ↔ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, ((𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦)))‘𝑡), 0)) − (𝑔‘𝑡))))) < (𝑌 / 2)))
120	119	rexbidv 3034	. . . 4 ⊢ (𝜑 → (∃𝑔 ∈ dom ∫1(∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) < (𝑌 / 2) ↔ ∃𝑔 ∈ dom ∫1(∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, ((𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦)))‘𝑡), 0)) − (𝑔‘𝑡))))) < (𝑌 / 2)))
121	120	adantr 480	. . 3 ⊢ ((𝜑 ∧ 𝑌 ∈ ℝ+) → (∃𝑔 ∈ dom ∫1(∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) < (𝑌 / 2) ↔ ∃𝑔 ∈ dom ∫1(∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, ((𝑦 ∈ 𝐷 ↦ ((1 / i) · (𝐹‘𝑦)))‘𝑡), 0)) − (𝑔‘𝑡))))) < (𝑌 / 2)))
122	91, 121	mpbird 246	. 2 ⊢ ((𝜑 ∧ 𝑌 ∈ ℝ+) → ∃𝑔 ∈ dom ∫1(∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) < (𝑌 / 2))
123		reeanv 3086	. . 3 ⊢ (∃𝑓 ∈ dom ∫1∃𝑔 ∈ dom ∫1((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) < (𝑌 / 2) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) < (𝑌 / 2)) ↔ (∃𝑓 ∈ dom ∫1(∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) < (𝑌 / 2) ∧ ∃𝑔 ∈ dom ∫1(∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) < (𝑌 / 2)))
124		eleq1 2676	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑥 = 𝑡 → (𝑥 ∈ 𝐷 ↔ 𝑡 ∈ 𝐷))
125		fveq2 6103	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑥 = 𝑡 → (𝐹‘𝑥) = (𝐹‘𝑡))
126	124, 125	ifbieq1d 4059	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑥 = 𝑡 → if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0) = if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))
127	126	fveq2d 6107	. . . . . . . . . . . . . . . . 17 ⊢ (𝑥 = 𝑡 → (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)) = (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)))
128		eqid 2610	. . . . . . . . . . . . . . . . 17 ⊢ (𝑥 ∈ ℝ ↦ (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0))) = (𝑥 ∈ ℝ ↦ (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)))
129		fvex 6113	. . . . . . . . . . . . . . . . 17 ⊢ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ V
130	127, 128, 129	fvmpt 6191	. . . . . . . . . . . . . . . 16 ⊢ (𝑡 ∈ ℝ → ((𝑥 ∈ ℝ ↦ (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)))‘𝑡) = (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)))
131	130	oveq1d 6564	. . . . . . . . . . . . . . 15 ⊢ (𝑡 ∈ ℝ → (((𝑥 ∈ ℝ ↦ (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)))‘𝑡) − (𝑓‘𝑡)) = ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))
132	131	fveq2d 6107	. . . . . . . . . . . . . 14 ⊢ (𝑡 ∈ ℝ → (abs‘(((𝑥 ∈ ℝ ↦ (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)))‘𝑡) − (𝑓‘𝑡))) = (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))
133	132	mpteq2ia 4668	. . . . . . . . . . . . 13 ⊢ (𝑡 ∈ ℝ ↦ (abs‘(((𝑥 ∈ ℝ ↦ (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)))‘𝑡) − (𝑓‘𝑡)))) = (𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))
134	133	fveq2i 6106	. . . . . . . . . . . 12 ⊢ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((𝑥 ∈ ℝ ↦ (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)))‘𝑡) − (𝑓‘𝑡))))) = (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))))
135		rembl 23115	. . . . . . . . . . . . . . . . . . 19 ⊢ ℝ ∈ dom vol
136	135	a1i 11	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → ℝ ∈ dom vol)
137		0cnd 9912	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝜑 ∧ ¬ 𝑥 ∈ 𝐷) → 0 ∈ ℂ)
138	37, 137	ifclda 4070	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝜑 → if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0) ∈ ℂ)
139	138	adantr 480	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0) ∈ ℂ)
140		eldifn 3695	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑥 ∈ (ℝ ∖ 𝐷) → ¬ 𝑥 ∈ 𝐷)
141	140	adantl 481	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℝ ∖ 𝐷)) → ¬ 𝑥 ∈ 𝐷)
142	141	iffalsed 4047	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℝ ∖ 𝐷)) → if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0) = 0)
143	9	feqmptd 6159	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝜑 → 𝐹 = (𝑥 ∈ 𝐷 ↦ (𝐹‘𝑥)))
144		iftrue 4042	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑥 ∈ 𝐷 → if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0) = (𝐹‘𝑥))
145	144	mpteq2ia 4668	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑥 ∈ 𝐷 ↦ if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)) = (𝑥 ∈ 𝐷 ↦ (𝐹‘𝑥))
146	143, 145	syl6eqr 2662	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝜑 → 𝐹 = (𝑥 ∈ 𝐷 ↦ if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)))
147	146, 8	eqeltrrd 2689	. . . . . . . . . . . . . . . . . 18 ⊢ (𝜑 → (𝑥 ∈ 𝐷 ↦ if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)) ∈ 𝐿1)
148	7, 136, 139, 142, 147	iblss2 23378	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → (𝑥 ∈ ℝ ↦ if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)) ∈ 𝐿1)
149	138	adantr 480	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ 𝑥 ∈ ℝ) → if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0) ∈ ℂ)
150	149	iblcn 23371	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → ((𝑥 ∈ ℝ ↦ if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)) ∈ 𝐿1 ↔ ((𝑥 ∈ ℝ ↦ (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0))) ∈ 𝐿1 ∧ (𝑥 ∈ ℝ ↦ (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0))) ∈ 𝐿1)))
151	148, 150	mpbid 221	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → ((𝑥 ∈ ℝ ↦ (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0))) ∈ 𝐿1 ∧ (𝑥 ∈ ℝ ↦ (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0))) ∈ 𝐿1))
152	151	simpld 474	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (𝑥 ∈ ℝ ↦ (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0))) ∈ 𝐿1)
153	149	recld 13782	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑥 ∈ ℝ) → (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)) ∈ ℝ)
154	153, 128	fmptd 6292	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (𝑥 ∈ ℝ ↦ (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0))):ℝ⟶ℝ)
155	152, 154	jca 553	. . . . . . . . . . . . . 14 ⊢ (𝜑 → ((𝑥 ∈ ℝ ↦ (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0))) ∈ 𝐿1 ∧ (𝑥 ∈ ℝ ↦ (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0))):ℝ⟶ℝ))
156		ftc1anclem4 32658	. . . . . . . . . . . . . . 15 ⊢ ((𝑓 ∈ dom ∫1 ∧ (𝑥 ∈ ℝ ↦ (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0))) ∈ 𝐿1 ∧ (𝑥 ∈ ℝ ↦ (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0))):ℝ⟶ℝ) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((𝑥 ∈ ℝ ↦ (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)))‘𝑡) − (𝑓‘𝑡))))) ∈ ℝ)
157	156	3expb 1258	. . . . . . . . . . . . . 14 ⊢ ((𝑓 ∈ dom ∫1 ∧ ((𝑥 ∈ ℝ ↦ (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0))) ∈ 𝐿1 ∧ (𝑥 ∈ ℝ ↦ (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0))):ℝ⟶ℝ)) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((𝑥 ∈ ℝ ↦ (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)))‘𝑡) − (𝑓‘𝑡))))) ∈ ℝ)
158	155, 157	sylan2 490	. . . . . . . . . . . . 13 ⊢ ((𝑓 ∈ dom ∫1 ∧ 𝜑) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((𝑥 ∈ ℝ ↦ (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)))‘𝑡) − (𝑓‘𝑡))))) ∈ ℝ)
159	158	ancoms 468	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑓 ∈ dom ∫1) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((𝑥 ∈ ℝ ↦ (ℜ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)))‘𝑡) − (𝑓‘𝑡))))) ∈ ℝ)
160	134, 159	syl5eqelr 2693	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑓 ∈ dom ∫1) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) ∈ ℝ)
161	126	fveq2d 6107	. . . . . . . . . . . . . . . . 17 ⊢ (𝑥 = 𝑡 → (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)) = (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)))
162		eqid 2610	. . . . . . . . . . . . . . . . 17 ⊢ (𝑥 ∈ ℝ ↦ (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0))) = (𝑥 ∈ ℝ ↦ (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)))
163		fvex 6113	. . . . . . . . . . . . . . . . 17 ⊢ (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ V
164	161, 162, 163	fvmpt 6191	. . . . . . . . . . . . . . . 16 ⊢ (𝑡 ∈ ℝ → ((𝑥 ∈ ℝ ↦ (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)))‘𝑡) = (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)))
165	164	oveq1d 6564	. . . . . . . . . . . . . . 15 ⊢ (𝑡 ∈ ℝ → (((𝑥 ∈ ℝ ↦ (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)))‘𝑡) − (𝑔‘𝑡)) = ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))
166	165	fveq2d 6107	. . . . . . . . . . . . . 14 ⊢ (𝑡 ∈ ℝ → (abs‘(((𝑥 ∈ ℝ ↦ (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)))‘𝑡) − (𝑔‘𝑡))) = (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))
167	166	mpteq2ia 4668	. . . . . . . . . . . . 13 ⊢ (𝑡 ∈ ℝ ↦ (abs‘(((𝑥 ∈ ℝ ↦ (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)))‘𝑡) − (𝑔‘𝑡)))) = (𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))
168	167	fveq2i 6106	. . . . . . . . . . . 12 ⊢ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((𝑥 ∈ ℝ ↦ (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)))‘𝑡) − (𝑔‘𝑡))))) = (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))
169	151	simprd 478	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (𝑥 ∈ ℝ ↦ (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0))) ∈ 𝐿1)
170	138	imcld 13783	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)) ∈ ℝ)
171	170	adantr 480	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑥 ∈ ℝ) → (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)) ∈ ℝ)
172	171, 162	fmptd 6292	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (𝑥 ∈ ℝ ↦ (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0))):ℝ⟶ℝ)
173	169, 172	jca 553	. . . . . . . . . . . . . 14 ⊢ (𝜑 → ((𝑥 ∈ ℝ ↦ (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0))) ∈ 𝐿1 ∧ (𝑥 ∈ ℝ ↦ (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0))):ℝ⟶ℝ))
174		ftc1anclem4 32658	. . . . . . . . . . . . . . 15 ⊢ ((𝑔 ∈ dom ∫1 ∧ (𝑥 ∈ ℝ ↦ (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0))) ∈ 𝐿1 ∧ (𝑥 ∈ ℝ ↦ (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0))):ℝ⟶ℝ) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((𝑥 ∈ ℝ ↦ (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)))‘𝑡) − (𝑔‘𝑡))))) ∈ ℝ)
175	174	3expb 1258	. . . . . . . . . . . . . 14 ⊢ ((𝑔 ∈ dom ∫1 ∧ ((𝑥 ∈ ℝ ↦ (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0))) ∈ 𝐿1 ∧ (𝑥 ∈ ℝ ↦ (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0))):ℝ⟶ℝ)) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((𝑥 ∈ ℝ ↦ (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)))‘𝑡) − (𝑔‘𝑡))))) ∈ ℝ)
176	173, 175	sylan2 490	. . . . . . . . . . . . 13 ⊢ ((𝑔 ∈ dom ∫1 ∧ 𝜑) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((𝑥 ∈ ℝ ↦ (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)))‘𝑡) − (𝑔‘𝑡))))) ∈ ℝ)
177	176	ancoms 468	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑔 ∈ dom ∫1) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((𝑥 ∈ ℝ ↦ (ℑ‘if(𝑥 ∈ 𝐷, (𝐹‘𝑥), 0)))‘𝑡) − (𝑔‘𝑡))))) ∈ ℝ)
178	168, 177	syl5eqelr 2693	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑔 ∈ dom ∫1) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) ∈ ℝ)
179	160, 178	anim12dan 878	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) ∈ ℝ ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) ∈ ℝ))
180	1	rpred 11748	. . . . . . . . . . 11 ⊢ (𝑌 ∈ ℝ+ → (𝑌 / 2) ∈ ℝ)
181	180, 180	jca 553	. . . . . . . . . 10 ⊢ (𝑌 ∈ ℝ+ → ((𝑌 / 2) ∈ ℝ ∧ (𝑌 / 2) ∈ ℝ))
182		lt2add 10392	. . . . . . . . . 10 ⊢ ((((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) ∈ ℝ ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) ∈ ℝ) ∧ ((𝑌 / 2) ∈ ℝ ∧ (𝑌 / 2) ∈ ℝ)) → (((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) < (𝑌 / 2) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) < (𝑌 / 2)) → ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) + (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))) < ((𝑌 / 2) + (𝑌 / 2))))
183	179, 181, 182	syl2an 493	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) ∧ 𝑌 ∈ ℝ+) → (((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) < (𝑌 / 2) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) < (𝑌 / 2)) → ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) + (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))) < ((𝑌 / 2) + (𝑌 / 2))))
184	183	an32s 842	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑌 ∈ ℝ+) ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) < (𝑌 / 2) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) < (𝑌 / 2)) → ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) + (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))) < ((𝑌 / 2) + (𝑌 / 2))))
185	94	recld 13782	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝜑 → (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℝ)
186	185	recnd 9947	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝜑 → (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℂ)
187		i1ff 23249	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑓 ∈ dom ∫1 → 𝑓:ℝ⟶ℝ)
188	187	ffvelrnda 6267	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝑓 ∈ dom ∫1 ∧ 𝑡 ∈ ℝ) → (𝑓‘𝑡) ∈ ℝ)
189	188	recnd 9947	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑓 ∈ dom ∫1 ∧ 𝑡 ∈ ℝ) → (𝑓‘𝑡) ∈ ℂ)
190		subcl 10159	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℂ ∧ (𝑓‘𝑡) ∈ ℂ) → ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ ℂ)
191	186, 189, 190	syl2an 493	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑡 ∈ ℝ)) → ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ ℂ)
192	191	anassrs 678	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ) → ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ ℂ)
193	192	adantlrr 753	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) ∧ 𝑡 ∈ ℝ) → ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ ℂ)
194	94	imcld 13783	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝜑 → (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℝ)
195	194	recnd 9947	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝜑 → (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℂ)
196		i1ff 23249	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑔 ∈ dom ∫1 → 𝑔:ℝ⟶ℝ)
197	196	ffvelrnda 6267	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((𝑔 ∈ dom ∫1 ∧ 𝑡 ∈ ℝ) → (𝑔‘𝑡) ∈ ℝ)
198	197	recnd 9947	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝑔 ∈ dom ∫1 ∧ 𝑡 ∈ ℝ) → (𝑔‘𝑡) ∈ ℂ)
199		subcl 10159	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℂ ∧ (𝑔‘𝑡) ∈ ℂ) → ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)) ∈ ℂ)
200	195, 198, 199	syl2an 493	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝜑 ∧ (𝑔 ∈ dom ∫1 ∧ 𝑡 ∈ ℝ)) → ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)) ∈ ℂ)
201	200	anassrs 678	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝜑 ∧ 𝑔 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ) → ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)) ∈ ℂ)
202		mulcl 9899	. . . . . . . . . . . . . . . . . . 19 ⊢ ((i ∈ ℂ ∧ ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)) ∈ ℂ) → (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))) ∈ ℂ)
203	13, 201, 202	sylancr 694	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝜑 ∧ 𝑔 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ) → (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))) ∈ ℂ)
204	203	adantlrl 752	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) ∧ 𝑡 ∈ ℝ) → (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))) ∈ ℂ)
205	193, 204	addcld 9938	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) ∧ 𝑡 ∈ ℝ) → (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))) ∈ ℂ)
206	205	abscld 14023	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) ∧ 𝑡 ∈ ℝ) → (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) ∈ ℝ)
207	206	rexrd 9968	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) ∧ 𝑡 ∈ ℝ) → (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) ∈ ℝ*)
208	205	absge0d 14031	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) ∧ 𝑡 ∈ ℝ) → 0 ≤ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))
209		elxrge0 12152	. . . . . . . . . . . . . 14 ⊢ ((abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) ∈ (0[,]+∞) ↔ ((abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) ∈ ℝ* ∧ 0 ≤ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))))
210	207, 208, 209	sylanbrc 695	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) ∧ 𝑡 ∈ ℝ) → (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) ∈ (0[,]+∞))
211		eqid 2610	. . . . . . . . . . . . 13 ⊢ (𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))) = (𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))
212	210, 211	fmptd 6292	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))):ℝ⟶(0[,]+∞))
213		icossicc 12131	. . . . . . . . . . . . . . 15 ⊢ (0[,)+∞) ⊆ (0[,]+∞)
214		ge0addcl 12155	. . . . . . . . . . . . . . 15 ⊢ ((𝑥 ∈ (0[,)+∞) ∧ 𝑦 ∈ (0[,)+∞)) → (𝑥 + 𝑦) ∈ (0[,)+∞))
215	213, 214	sseldi 3566	. . . . . . . . . . . . . 14 ⊢ ((𝑥 ∈ (0[,)+∞) ∧ 𝑦 ∈ (0[,)+∞)) → (𝑥 + 𝑦) ∈ (0[,]+∞))
216	215	adantl 481	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) ∧ (𝑥 ∈ (0[,)+∞) ∧ 𝑦 ∈ (0[,)+∞))) → (𝑥 + 𝑦) ∈ (0[,]+∞))
217	192	abscld 14023	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ) → (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) ∈ ℝ)
218	192	absge0d 14031	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ) → 0 ≤ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))
219		elrege0 12149	. . . . . . . . . . . . . . . 16 ⊢ ((abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) ∈ (0[,)+∞) ↔ ((abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) ∈ ℝ ∧ 0 ≤ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))))
220	217, 218, 219	sylanbrc 695	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ) → (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) ∈ (0[,)+∞))
221		eqid 2610	. . . . . . . . . . . . . . 15 ⊢ (𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))) = (𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))
222	220, 221	fmptd 6292	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑓 ∈ dom ∫1) → (𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))):ℝ⟶(0[,)+∞))
223	222	adantrr 749	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))):ℝ⟶(0[,)+∞))
224	201	abscld 14023	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑔 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ) → (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))) ∈ ℝ)
225	201	absge0d 14031	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑔 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ) → 0 ≤ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))
226		elrege0 12149	. . . . . . . . . . . . . . . 16 ⊢ ((abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))) ∈ (0[,)+∞) ↔ ((abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))) ∈ ℝ ∧ 0 ≤ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))
227	224, 225, 226	sylanbrc 695	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝑔 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ) → (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))) ∈ (0[,)+∞))
228		eqid 2610	. . . . . . . . . . . . . . 15 ⊢ (𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))) = (𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))
229	227, 228	fmptd 6292	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑔 ∈ dom ∫1) → (𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))):ℝ⟶(0[,)+∞))
230	229	adantrl 748	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))):ℝ⟶(0[,)+∞))
231		reex 9906	. . . . . . . . . . . . . 14 ⊢ ℝ ∈ V
232	231	a1i 11	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → ℝ ∈ V)
233		inidm 3784	. . . . . . . . . . . . 13 ⊢ (ℝ ∩ ℝ) = ℝ
234	216, 223, 230, 232, 232, 233	off 6810	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → ((𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))) ∘𝑓 + (𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))):ℝ⟶(0[,]+∞))
235	193, 204	abstrid 14043	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) ∧ 𝑡 ∈ ℝ) → (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) ≤ ((abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) + (abs‘(i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))
236	235	ralrimiva 2949	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → ∀𝑡 ∈ ℝ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) ≤ ((abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) + (abs‘(i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))
237		ovex 6577	. . . . . . . . . . . . . . 15 ⊢ ((abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) + (abs‘(i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) ∈ V
238	237	a1i 11	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) ∧ 𝑡 ∈ ℝ) → ((abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) + (abs‘(i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) ∈ V)
239		eqidd 2611	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))) = (𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))))
240		fvex 6113	. . . . . . . . . . . . . . . 16 ⊢ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) ∈ V
241	240	a1i 11	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) ∧ 𝑡 ∈ ℝ) → (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) ∈ V)
242		fvex 6113	. . . . . . . . . . . . . . . 16 ⊢ (abs‘(i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))) ∈ V
243	242	a1i 11	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) ∧ 𝑡 ∈ ℝ) → (abs‘(i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))) ∈ V)
244		eqidd 2611	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))) = (𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))))
245		absmul 13882	. . . . . . . . . . . . . . . . . . 19 ⊢ ((i ∈ ℂ ∧ ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)) ∈ ℂ) → (abs‘(i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))) = ((abs‘i) · (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))
246	13, 201, 245	sylancr 694	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝜑 ∧ 𝑔 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ) → (abs‘(i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))) = ((abs‘i) · (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))
247		absi 13874	. . . . . . . . . . . . . . . . . . . 20 ⊢ (abs‘i) = 1
248	247	oveq1i 6559	. . . . . . . . . . . . . . . . . . 19 ⊢ ((abs‘i) · (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))) = (1 · (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))
249	224	recnd 9947	. . . . . . . . . . . . . . . . . . . 20 ⊢ (((𝜑 ∧ 𝑔 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ) → (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))) ∈ ℂ)
250	249	mulid2d 9937	. . . . . . . . . . . . . . . . . . 19 ⊢ (((𝜑 ∧ 𝑔 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ) → (1 · (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))) = (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))
251	248, 250	syl5eq 2656	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝜑 ∧ 𝑔 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ) → ((abs‘i) · (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))) = (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))
252	246, 251	eqtr2d 2645	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ 𝑔 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ) → (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))) = (abs‘(i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))
253	252	mpteq2dva 4672	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑔 ∈ dom ∫1) → (𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))) = (𝑡 ∈ ℝ ↦ (abs‘(i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))
254	253	adantrl 748	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))) = (𝑡 ∈ ℝ ↦ (abs‘(i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))
255	232, 241, 243, 244, 254	offval2 6812	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → ((𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))) ∘𝑓 + (𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) = (𝑡 ∈ ℝ ↦ ((abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) + (abs‘(i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))))
256	232, 206, 238, 239, 255	ofrfval2 6813	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → ((𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))) ∘𝑟 ≤ ((𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))) ∘𝑓 + (𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) ↔ ∀𝑡 ∈ ℝ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) ≤ ((abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) + (abs‘(i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))))
257	236, 256	mpbird 246	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))) ∘𝑟 ≤ ((𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))) ∘𝑓 + (𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))
258		itg2le 23312	. . . . . . . . . . . 12 ⊢ (((𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))):ℝ⟶(0[,]+∞) ∧ ((𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))) ∘𝑓 + (𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))):ℝ⟶(0[,]+∞) ∧ (𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))) ∘𝑟 ≤ ((𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))) ∘𝑓 + (𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))) ≤ (∫2‘((𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))) ∘𝑓 + (𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))))
259	212, 234, 257, 258	syl3anc 1318	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))) ≤ (∫2‘((𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))) ∘𝑓 + (𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))))
260		eqidd 2611	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑓 ∈ dom ∫1) → (𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) = (𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))
261		absf 13925	. . . . . . . . . . . . . . . . 17 ⊢ abs:ℂ⟶ℝ
262	261	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑓 ∈ dom ∫1) → abs:ℂ⟶ℝ)
263	262	feqmptd 6159	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑓 ∈ dom ∫1) → abs = (𝑥 ∈ ℂ ↦ (abs‘𝑥)))
264		fveq2 6103	. . . . . . . . . . . . . . 15 ⊢ (𝑥 = ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) → (abs‘𝑥) = (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))
265	192, 260, 263, 264	fmptco 6303	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑓 ∈ dom ∫1) → (abs ∘ (𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))) = (𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))))
266		resubcl 10224	. . . . . . . . . . . . . . . . . 18 ⊢ (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℝ ∧ (𝑓‘𝑡) ∈ ℝ) → ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ ℝ)
267	185, 188, 266	syl2an 493	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑡 ∈ ℝ)) → ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ ℝ)
268	267	anassrs 678	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ) → ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ ℝ)
269		eqid 2610	. . . . . . . . . . . . . . . 16 ⊢ (𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) = (𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))
270	268, 269	fmptd 6292	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑓 ∈ dom ∫1) → (𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))):ℝ⟶ℝ)
271	135	a1i 11	. . . . . . . . . . . . . . . 16 ⊢ ((𝜑 ∧ 𝑓 ∈ dom ∫1) → ℝ ∈ dom vol)
272		iunin2 4520	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ∪ 𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ∩ (◡𝑓 “ {𝑦})) = ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ∩ ∪ 𝑦 ∈ ran 𝑓(◡𝑓 “ {𝑦}))
273		imaiun 6407	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (◡𝑓 “ ∪ 𝑦 ∈ ran 𝑓{𝑦}) = ∪ 𝑦 ∈ ran 𝑓(◡𝑓 “ {𝑦})
274		iunid 4511	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ ∪ 𝑦 ∈ ran 𝑓{𝑦} = ran 𝑓
275	274	imaeq2i 5383	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (◡𝑓 “ ∪ 𝑦 ∈ ran 𝑓{𝑦}) = (◡𝑓 “ ran 𝑓)
276	273, 275	eqtr3i 2634	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ∪ 𝑦 ∈ ran 𝑓(◡𝑓 “ {𝑦}) = (◡𝑓 “ ran 𝑓)
277	276	ineq2i 3773	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ∩ ∪ 𝑦 ∈ ran 𝑓(◡𝑓 “ {𝑦})) = ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ∩ (◡𝑓 “ ran 𝑓))
278	272, 277	eqtri 2632	. . . . . . . . . . . . . . . . . . . 20 ⊢ ∪ 𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ∩ (◡𝑓 “ {𝑦})) = ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ∩ (◡𝑓 “ ran 𝑓))
279		cnvimass 5404	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ⊆ dom (𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))
280		ovex 6577	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ V
281	280, 269	dmmpti 5936	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ dom (𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) = ℝ
282	279, 281	sseqtri 3600	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ⊆ ℝ
283		cnvimarndm 5405	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (◡𝑓 “ ran 𝑓) = dom 𝑓
284		fdm 5964	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑓:ℝ⟶ℝ → dom 𝑓 = ℝ)
285	187, 284	syl 17	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑓 ∈ dom ∫1 → dom 𝑓 = ℝ)
286	283, 285	syl5eq 2656	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑓 ∈ dom ∫1 → (◡𝑓 “ ran 𝑓) = ℝ)
287	282, 286	syl5sseqr 3617	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑓 ∈ dom ∫1 → (◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ⊆ (◡𝑓 “ ran 𝑓))
288		df-ss 3554	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ⊆ (◡𝑓 “ ran 𝑓) ↔ ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ∩ (◡𝑓 “ ran 𝑓)) = (◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)))
289	287, 288	sylib 207	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑓 ∈ dom ∫1 → ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ∩ (◡𝑓 “ ran 𝑓)) = (◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)))
290	278, 289	syl5eq 2656	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑓 ∈ dom ∫1 → ∪ 𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ∩ (◡𝑓 “ {𝑦})) = (◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)))
291	290	ad2antlr 759	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) → ∪ 𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ∩ (◡𝑓 “ {𝑦})) = (◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)))
292		frn 5966	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (𝑓:ℝ⟶ℝ → ran 𝑓 ⊆ ℝ)
293	187, 292	syl 17	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑓 ∈ dom ∫1 → ran 𝑓 ⊆ ℝ)
294	293	ad2antlr 759	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) → ran 𝑓 ⊆ ℝ)
295	294	sselda 3568	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ran 𝑓) → 𝑦 ∈ ℝ)
296	185	ad2antrr 758	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℝ)
297		resubcl 10224	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ⊢ (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℝ ∧ 𝑦 ∈ ℝ) → ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) ∈ ℝ)
298	185, 297	sylan 487	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ) → ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) ∈ ℝ)
299	298	adantlr 747	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) ∈ ℝ)
300	296, 299	2thd 254	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℝ ↔ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) ∈ ℝ))
301		ltaddsub 10381	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ ∧ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℝ) → ((𝑥 + 𝑦) < (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ↔ 𝑥 < ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦)))
302	185, 301	syl3an3 1353	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ ∧ 𝜑) → ((𝑥 + 𝑦) < (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ↔ 𝑥 < ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦)))
303	302	3comr 1265	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((𝜑 ∧ 𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → ((𝑥 + 𝑦) < (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ↔ 𝑥 < ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦)))
304	303	3expa 1257	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → ((𝑥 + 𝑦) < (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ↔ 𝑥 < ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦)))
305	300, 304	anbi12d 743	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℝ ∧ (𝑥 + 𝑦) < (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) ↔ (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) ∈ ℝ ∧ 𝑥 < ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦))))
306		readdcl 9898	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝑥 + 𝑦) ∈ ℝ)
307	306	rexrd 9968	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (𝑥 + 𝑦) ∈ ℝ*)
308	307	adantll 746	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → (𝑥 + 𝑦) ∈ ℝ*)
309		elioopnf 12138	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ ((𝑥 + 𝑦) ∈ ℝ* → ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ((𝑥 + 𝑦)(,)+∞) ↔ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℝ ∧ (𝑥 + 𝑦) < (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)))))
310	308, 309	syl 17	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ((𝑥 + 𝑦)(,)+∞) ↔ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℝ ∧ (𝑥 + 𝑦) < (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)))))
311		rexr 9964	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (𝑥 ∈ ℝ → 𝑥 ∈ ℝ*)
312	311	ad2antlr 759	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → 𝑥 ∈ ℝ*)
313		elioopnf 12138	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (𝑥 ∈ ℝ* → (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) ∈ (𝑥(,)+∞) ↔ (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) ∈ ℝ ∧ 𝑥 < ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦))))
314	312, 313	syl 17	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) ∈ (𝑥(,)+∞) ↔ (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) ∈ ℝ ∧ 𝑥 < ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦))))
315	305, 310, 314	3bitr4rd 300	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) ∈ (𝑥(,)+∞) ↔ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ((𝑥 + 𝑦)(,)+∞)))
316		oveq2 6557	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ ((𝑓‘𝑡) = 𝑦 → ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) = ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦))
317	316	eleq1d 2672	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝑓‘𝑡) = 𝑦 → (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (𝑥(,)+∞) ↔ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) ∈ (𝑥(,)+∞)))
318	317	bibi1d 332	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ ((𝑓‘𝑡) = 𝑦 → ((((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (𝑥(,)+∞) ↔ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ((𝑥 + 𝑦)(,)+∞)) ↔ (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) ∈ (𝑥(,)+∞) ↔ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ((𝑥 + 𝑦)(,)+∞))))
319	315, 318	syl5ibrcom 236	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → ((𝑓‘𝑡) = 𝑦 → (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (𝑥(,)+∞) ↔ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ((𝑥 + 𝑦)(,)+∞))))
320	319	pm5.32rd 670	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → ((((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (𝑥(,)+∞) ∧ (𝑓‘𝑡) = 𝑦) ↔ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ((𝑥 + 𝑦)(,)+∞) ∧ (𝑓‘𝑡) = 𝑦)))
321	320	adantllr 751	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → ((((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (𝑥(,)+∞) ∧ (𝑓‘𝑡) = 𝑦) ↔ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ((𝑥 + 𝑦)(,)+∞) ∧ (𝑓‘𝑡) = 𝑦)))
322	295, 321	syldan 486	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ran 𝑓) → ((((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (𝑥(,)+∞) ∧ (𝑓‘𝑡) = 𝑦) ↔ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ((𝑥 + 𝑦)(,)+∞) ∧ (𝑓‘𝑡) = 𝑦)))
323	322	rabbidv 3164	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ran 𝑓) → {𝑡 ∈ ℝ ∣ (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (𝑥(,)+∞) ∧ (𝑓‘𝑡) = 𝑦)} = {𝑡 ∈ ℝ ∣ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ((𝑥 + 𝑦)(,)+∞) ∧ (𝑓‘𝑡) = 𝑦)})
324	187	feqmptd 6159	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (𝑓 ∈ dom ∫1 → 𝑓 = (𝑡 ∈ ℝ ↦ (𝑓‘𝑡)))
325	324	cnveqd 5220	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝑓 ∈ dom ∫1 → ◡𝑓 = ◡(𝑡 ∈ ℝ ↦ (𝑓‘𝑡)))
326	325	imaeq1d 5384	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝑓 ∈ dom ∫1 → (◡𝑓 “ {𝑦}) = (◡(𝑡 ∈ ℝ ↦ (𝑓‘𝑡)) “ {𝑦}))
327	326	ineq2d 3776	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑓 ∈ dom ∫1 → ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ∩ (◡𝑓 “ {𝑦})) = ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ∩ (◡(𝑡 ∈ ℝ ↦ (𝑓‘𝑡)) “ {𝑦})))
328	269	mptpreima 5545	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) = {𝑡 ∈ ℝ ∣ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (𝑥(,)+∞)}
329		vex 3176	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ 𝑦 ∈ V
330		eqid 2610	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (𝑡 ∈ ℝ ↦ (𝑓‘𝑡)) = (𝑡 ∈ ℝ ↦ (𝑓‘𝑡))
331	330	mptiniseg 5546	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (𝑦 ∈ V → (◡(𝑡 ∈ ℝ ↦ (𝑓‘𝑡)) “ {𝑦}) = {𝑡 ∈ ℝ ∣ (𝑓‘𝑡) = 𝑦})
332	329, 331	ax-mp 5	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (◡(𝑡 ∈ ℝ ↦ (𝑓‘𝑡)) “ {𝑦}) = {𝑡 ∈ ℝ ∣ (𝑓‘𝑡) = 𝑦}
333	328, 332	ineq12i 3774	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ∩ (◡(𝑡 ∈ ℝ ↦ (𝑓‘𝑡)) “ {𝑦})) = ({𝑡 ∈ ℝ ∣ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (𝑥(,)+∞)} ∩ {𝑡 ∈ ℝ ∣ (𝑓‘𝑡) = 𝑦})
334		inrab 3858	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ({𝑡 ∈ ℝ ∣ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (𝑥(,)+∞)} ∩ {𝑡 ∈ ℝ ∣ (𝑓‘𝑡) = 𝑦}) = {𝑡 ∈ ℝ ∣ (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (𝑥(,)+∞) ∧ (𝑓‘𝑡) = 𝑦)}
335	333, 334	eqtri 2632	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ∩ (◡(𝑡 ∈ ℝ ↦ (𝑓‘𝑡)) “ {𝑦})) = {𝑡 ∈ ℝ ∣ (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (𝑥(,)+∞) ∧ (𝑓‘𝑡) = 𝑦)}
336	327, 335	syl6eq 2660	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑓 ∈ dom ∫1 → ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ∩ (◡𝑓 “ {𝑦})) = {𝑡 ∈ ℝ ∣ (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (𝑥(,)+∞) ∧ (𝑓‘𝑡) = 𝑦)})
337	336	ad3antlr 763	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ran 𝑓) → ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ∩ (◡𝑓 “ {𝑦})) = {𝑡 ∈ ℝ ∣ (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (𝑥(,)+∞) ∧ (𝑓‘𝑡) = 𝑦)})
338	326	ineq2d 3776	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑓 ∈ dom ∫1 → ((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ ((𝑥 + 𝑦)(,)+∞)) ∩ (◡𝑓 “ {𝑦})) = ((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ ((𝑥 + 𝑦)(,)+∞)) ∩ (◡(𝑡 ∈ ℝ ↦ (𝑓‘𝑡)) “ {𝑦})))
339		eqid 2610	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) = (𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)))
340	339	mptpreima 5545	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ ((𝑥 + 𝑦)(,)+∞)) = {𝑡 ∈ ℝ ∣ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ((𝑥 + 𝑦)(,)+∞)}
341	340, 332	ineq12i 3774	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ ((𝑥 + 𝑦)(,)+∞)) ∩ (◡(𝑡 ∈ ℝ ↦ (𝑓‘𝑡)) “ {𝑦})) = ({𝑡 ∈ ℝ ∣ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ((𝑥 + 𝑦)(,)+∞)} ∩ {𝑡 ∈ ℝ ∣ (𝑓‘𝑡) = 𝑦})
342		inrab 3858	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ({𝑡 ∈ ℝ ∣ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ((𝑥 + 𝑦)(,)+∞)} ∩ {𝑡 ∈ ℝ ∣ (𝑓‘𝑡) = 𝑦}) = {𝑡 ∈ ℝ ∣ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ((𝑥 + 𝑦)(,)+∞) ∧ (𝑓‘𝑡) = 𝑦)}
343	341, 342	eqtri 2632	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ ((𝑥 + 𝑦)(,)+∞)) ∩ (◡(𝑡 ∈ ℝ ↦ (𝑓‘𝑡)) “ {𝑦})) = {𝑡 ∈ ℝ ∣ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ((𝑥 + 𝑦)(,)+∞) ∧ (𝑓‘𝑡) = 𝑦)}
344	338, 343	syl6eq 2660	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑓 ∈ dom ∫1 → ((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ ((𝑥 + 𝑦)(,)+∞)) ∩ (◡𝑓 “ {𝑦})) = {𝑡 ∈ ℝ ∣ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ((𝑥 + 𝑦)(,)+∞) ∧ (𝑓‘𝑡) = 𝑦)})
345	344	ad3antlr 763	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ran 𝑓) → ((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ ((𝑥 + 𝑦)(,)+∞)) ∩ (◡𝑓 “ {𝑦})) = {𝑡 ∈ ℝ ∣ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ((𝑥 + 𝑦)(,)+∞) ∧ (𝑓‘𝑡) = 𝑦)})
346	323, 337, 345	3eqtr4d 2654	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ran 𝑓) → ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ∩ (◡𝑓 “ {𝑦})) = ((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ ((𝑥 + 𝑦)(,)+∞)) ∩ (◡𝑓 “ {𝑦})))
347	346	iuneq2dv 4478	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) → ∪ 𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ∩ (◡𝑓 “ {𝑦})) = ∪ 𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ ((𝑥 + 𝑦)(,)+∞)) ∩ (◡𝑓 “ {𝑦})))
348	291, 347	eqtr3d 2646	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) → (◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) = ∪ 𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ ((𝑥 + 𝑦)(,)+∞)) ∩ (◡𝑓 “ {𝑦})))
349		i1frn 23250	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑓 ∈ dom ∫1 → ran 𝑓 ∈ Fin)
350	349	adantl 481	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝜑 ∧ 𝑓 ∈ dom ∫1) → ran 𝑓 ∈ Fin)
351	94	adantr 480	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ ((𝜑 ∧ 𝑡 ∈ 𝐷) → if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) ∈ ℂ)
352		eldifn 3695	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (𝑡 ∈ (ℝ ∖ 𝐷) → ¬ 𝑡 ∈ 𝐷)
353	352	adantl 481	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝜑 ∧ 𝑡 ∈ (ℝ ∖ 𝐷)) → ¬ 𝑡 ∈ 𝐷)
354	353	iffalsed 4047	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ ((𝜑 ∧ 𝑡 ∈ (ℝ ∖ 𝐷)) → if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) = 0)
355	9	feqmptd 6159	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (𝜑 → 𝐹 = (𝑡 ∈ 𝐷 ↦ (𝐹‘𝑡)))
356		iftrue 4042	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (𝑡 ∈ 𝐷 → if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) = (𝐹‘𝑡))
357	356	mpteq2ia 4668	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (𝑡 ∈ 𝐷 ↦ if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) = (𝑡 ∈ 𝐷 ↦ (𝐹‘𝑡))
358	355, 357	syl6eqr 2662	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (𝜑 → 𝐹 = (𝑡 ∈ 𝐷 ↦ if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)))
359		iblmbf 23340	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (𝐹 ∈ 𝐿1 → 𝐹 ∈ MblFn)
360	8, 359	syl 17	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (𝜑 → 𝐹 ∈ MblFn)
361	358, 360	eqeltrrd 2689	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (𝜑 → (𝑡 ∈ 𝐷 ↦ if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ MblFn)
362	7, 136, 351, 354, 361	mbfss 23219	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝜑 → (𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ MblFn)
363	94	adantr 480	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ ((𝜑 ∧ 𝑡 ∈ ℝ) → if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) ∈ ℂ)
364	363	ismbfcn2 23212	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (𝜑 → ((𝑡 ∈ ℝ ↦ if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ MblFn ↔ ((𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) ∈ MblFn ∧ (𝑡 ∈ ℝ ↦ (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) ∈ MblFn)))
365	362, 364	mpbid 221	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (𝜑 → ((𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) ∈ MblFn ∧ (𝑡 ∈ ℝ ↦ (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) ∈ MblFn))
366	365	simpld 474	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝜑 → (𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) ∈ MblFn)
367	185	adantr 480	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((𝜑 ∧ 𝑡 ∈ ℝ) → (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℝ)
368	367, 339	fmptd 6292	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝜑 → (𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))):ℝ⟶ℝ)
369		mbfima 23205	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (((𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) ∈ MblFn ∧ (𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))):ℝ⟶ℝ) → (◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ ((𝑥 + 𝑦)(,)+∞)) ∈ dom vol)
370	366, 368, 369	syl2anc 691	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝜑 → (◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ ((𝑥 + 𝑦)(,)+∞)) ∈ dom vol)
371		i1fima 23251	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑓 ∈ dom ∫1 → (◡𝑓 “ {𝑦}) ∈ dom vol)
372		inmbl 23117	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ ((𝑥 + 𝑦)(,)+∞)) ∈ dom vol ∧ (◡𝑓 “ {𝑦}) ∈ dom vol) → ((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ ((𝑥 + 𝑦)(,)+∞)) ∩ (◡𝑓 “ {𝑦})) ∈ dom vol)
373	370, 371, 372	syl2an 493	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝜑 ∧ 𝑓 ∈ dom ∫1) → ((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ ((𝑥 + 𝑦)(,)+∞)) ∩ (◡𝑓 “ {𝑦})) ∈ dom vol)
374	373	ralrimivw 2950	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝜑 ∧ 𝑓 ∈ dom ∫1) → ∀𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ ((𝑥 + 𝑦)(,)+∞)) ∩ (◡𝑓 “ {𝑦})) ∈ dom vol)
375		finiunmbl 23119	. . . . . . . . . . . . . . . . . . 19 ⊢ ((ran 𝑓 ∈ Fin ∧ ∀𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ ((𝑥 + 𝑦)(,)+∞)) ∩ (◡𝑓 “ {𝑦})) ∈ dom vol) → ∪ 𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ ((𝑥 + 𝑦)(,)+∞)) ∩ (◡𝑓 “ {𝑦})) ∈ dom vol)
376	350, 374, 375	syl2anc 691	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ 𝑓 ∈ dom ∫1) → ∪ 𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ ((𝑥 + 𝑦)(,)+∞)) ∩ (◡𝑓 “ {𝑦})) ∈ dom vol)
377	376	adantr 480	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) → ∪ 𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ ((𝑥 + 𝑦)(,)+∞)) ∩ (◡𝑓 “ {𝑦})) ∈ dom vol)
378	348, 377	eqeltrd 2688	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) → (◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (𝑥(,)+∞)) ∈ dom vol)
379		iunin2 4520	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ∪ 𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ∩ (◡𝑓 “ {𝑦})) = ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ∩ ∪ 𝑦 ∈ ran 𝑓(◡𝑓 “ {𝑦}))
380	276	ineq2i 3773	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ∩ ∪ 𝑦 ∈ ran 𝑓(◡𝑓 “ {𝑦})) = ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ∩ (◡𝑓 “ ran 𝑓))
381	379, 380	eqtri 2632	. . . . . . . . . . . . . . . . . . . 20 ⊢ ∪ 𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ∩ (◡𝑓 “ {𝑦})) = ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ∩ (◡𝑓 “ ran 𝑓))
382		cnvimass 5404	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ⊆ dom (𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))
383	382, 281	sseqtri 3600	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ⊆ ℝ
384	383, 286	syl5sseqr 3617	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑓 ∈ dom ∫1 → (◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ⊆ (◡𝑓 “ ran 𝑓))
385		df-ss 3554	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ⊆ (◡𝑓 “ ran 𝑓) ↔ ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ∩ (◡𝑓 “ ran 𝑓)) = (◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)))
386	384, 385	sylib 207	. . . . . . . . . . . . . . . . . . . 20 ⊢ (𝑓 ∈ dom ∫1 → ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ∩ (◡𝑓 “ ran 𝑓)) = (◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)))
387	381, 386	syl5eq 2656	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑓 ∈ dom ∫1 → ∪ 𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ∩ (◡𝑓 “ {𝑦})) = (◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)))
388	387	ad2antlr 759	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) → ∪ 𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ∩ (◡𝑓 “ {𝑦})) = (◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)))
389	299, 296	2thd 254	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) ∈ ℝ ↔ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℝ))
390		ltsubadd 10377	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 ⊢ (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℝ ∧ 𝑦 ∈ ℝ ∧ 𝑥 ∈ ℝ) → (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) < 𝑥 ↔ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) < (𝑥 + 𝑦)))
391	185, 390	syl3an1 1351	. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 ⊢ ((𝜑 ∧ 𝑦 ∈ ℝ ∧ 𝑥 ∈ ℝ) → (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) < 𝑥 ↔ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) < (𝑥 + 𝑦)))
392	391	3expa 1257	. . . . . . . . . . . . . . . . . . . . . . . . . . . 28 ⊢ (((𝜑 ∧ 𝑦 ∈ ℝ) ∧ 𝑥 ∈ ℝ) → (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) < 𝑥 ↔ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) < (𝑥 + 𝑦)))
393	392	an32s 842	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) < 𝑥 ↔ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) < (𝑥 + 𝑦)))
394	389, 393	anbi12d 743	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → ((((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) ∈ ℝ ∧ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) < 𝑥) ↔ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℝ ∧ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) < (𝑥 + 𝑦))))
395		elioomnf 12139	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ (𝑥 ∈ ℝ* → (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) ∈ (-∞(,)𝑥) ↔ (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) ∈ ℝ ∧ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) < 𝑥)))
396	312, 395	syl 17	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) ∈ (-∞(,)𝑥) ↔ (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) ∈ ℝ ∧ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) < 𝑥)))
397		elioomnf 12139	. . . . . . . . . . . . . . . . . . . . . . . . . . 27 ⊢ ((𝑥 + 𝑦) ∈ ℝ* → ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ (-∞(,)(𝑥 + 𝑦)) ↔ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℝ ∧ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) < (𝑥 + 𝑦))))
398	308, 397	syl 17	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ (-∞(,)(𝑥 + 𝑦)) ↔ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℝ ∧ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) < (𝑥 + 𝑦))))
399	394, 396, 398	3bitr4d 299	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) ∈ (-∞(,)𝑥) ↔ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ (-∞(,)(𝑥 + 𝑦))))
400	316	eleq1d 2672	. . . . . . . . . . . . . . . . . . . . . . . . . 26 ⊢ ((𝑓‘𝑡) = 𝑦 → (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (-∞(,)𝑥) ↔ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) ∈ (-∞(,)𝑥)))
401	400	bibi1d 332	. . . . . . . . . . . . . . . . . . . . . . . . 25 ⊢ ((𝑓‘𝑡) = 𝑦 → ((((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (-∞(,)𝑥) ↔ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ (-∞(,)(𝑥 + 𝑦))) ↔ (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − 𝑦) ∈ (-∞(,)𝑥) ↔ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ (-∞(,)(𝑥 + 𝑦)))))
402	399, 401	syl5ibrcom 236	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → ((𝑓‘𝑡) = 𝑦 → (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (-∞(,)𝑥) ↔ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ (-∞(,)(𝑥 + 𝑦)))))
403	402	pm5.32rd 670	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ (((𝜑 ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → ((((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (-∞(,)𝑥) ∧ (𝑓‘𝑡) = 𝑦) ↔ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ (-∞(,)(𝑥 + 𝑦)) ∧ (𝑓‘𝑡) = 𝑦)))
404	403	adantllr 751	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ℝ) → ((((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (-∞(,)𝑥) ∧ (𝑓‘𝑡) = 𝑦) ↔ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ (-∞(,)(𝑥 + 𝑦)) ∧ (𝑓‘𝑡) = 𝑦)))
405	295, 404	syldan 486	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ran 𝑓) → ((((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (-∞(,)𝑥) ∧ (𝑓‘𝑡) = 𝑦) ↔ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ (-∞(,)(𝑥 + 𝑦)) ∧ (𝑓‘𝑡) = 𝑦)))
406	405	rabbidv 3164	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ran 𝑓) → {𝑡 ∈ ℝ ∣ (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (-∞(,)𝑥) ∧ (𝑓‘𝑡) = 𝑦)} = {𝑡 ∈ ℝ ∣ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ (-∞(,)(𝑥 + 𝑦)) ∧ (𝑓‘𝑡) = 𝑦)})
407	326	ineq2d 3776	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑓 ∈ dom ∫1 → ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ∩ (◡𝑓 “ {𝑦})) = ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ∩ (◡(𝑡 ∈ ℝ ↦ (𝑓‘𝑡)) “ {𝑦})))
408	269	mptpreima 5545	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) = {𝑡 ∈ ℝ ∣ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (-∞(,)𝑥)}
409	408, 332	ineq12i 3774	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ∩ (◡(𝑡 ∈ ℝ ↦ (𝑓‘𝑡)) “ {𝑦})) = ({𝑡 ∈ ℝ ∣ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (-∞(,)𝑥)} ∩ {𝑡 ∈ ℝ ∣ (𝑓‘𝑡) = 𝑦})
410		inrab 3858	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ({𝑡 ∈ ℝ ∣ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (-∞(,)𝑥)} ∩ {𝑡 ∈ ℝ ∣ (𝑓‘𝑡) = 𝑦}) = {𝑡 ∈ ℝ ∣ (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (-∞(,)𝑥) ∧ (𝑓‘𝑡) = 𝑦)}
411	409, 410	eqtri 2632	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ∩ (◡(𝑡 ∈ ℝ ↦ (𝑓‘𝑡)) “ {𝑦})) = {𝑡 ∈ ℝ ∣ (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (-∞(,)𝑥) ∧ (𝑓‘𝑡) = 𝑦)}
412	407, 411	syl6eq 2660	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑓 ∈ dom ∫1 → ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ∩ (◡𝑓 “ {𝑦})) = {𝑡 ∈ ℝ ∣ (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (-∞(,)𝑥) ∧ (𝑓‘𝑡) = 𝑦)})
413	412	ad3antlr 763	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ran 𝑓) → ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ∩ (◡𝑓 “ {𝑦})) = {𝑡 ∈ ℝ ∣ (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) ∈ (-∞(,)𝑥) ∧ (𝑓‘𝑡) = 𝑦)})
414	326	ineq2d 3776	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (𝑓 ∈ dom ∫1 → ((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ (-∞(,)(𝑥 + 𝑦))) ∩ (◡𝑓 “ {𝑦})) = ((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ (-∞(,)(𝑥 + 𝑦))) ∩ (◡(𝑡 ∈ ℝ ↦ (𝑓‘𝑡)) “ {𝑦})))
415	339	mptpreima 5545	. . . . . . . . . . . . . . . . . . . . . . . 24 ⊢ (◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ (-∞(,)(𝑥 + 𝑦))) = {𝑡 ∈ ℝ ∣ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ (-∞(,)(𝑥 + 𝑦))}
416	415, 332	ineq12i 3774	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ (-∞(,)(𝑥 + 𝑦))) ∩ (◡(𝑡 ∈ ℝ ↦ (𝑓‘𝑡)) “ {𝑦})) = ({𝑡 ∈ ℝ ∣ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ (-∞(,)(𝑥 + 𝑦))} ∩ {𝑡 ∈ ℝ ∣ (𝑓‘𝑡) = 𝑦})
417		inrab 3858	. . . . . . . . . . . . . . . . . . . . . . 23 ⊢ ({𝑡 ∈ ℝ ∣ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ (-∞(,)(𝑥 + 𝑦))} ∩ {𝑡 ∈ ℝ ∣ (𝑓‘𝑡) = 𝑦}) = {𝑡 ∈ ℝ ∣ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ (-∞(,)(𝑥 + 𝑦)) ∧ (𝑓‘𝑡) = 𝑦)}
418	416, 417	eqtri 2632	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ ((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ (-∞(,)(𝑥 + 𝑦))) ∩ (◡(𝑡 ∈ ℝ ↦ (𝑓‘𝑡)) “ {𝑦})) = {𝑡 ∈ ℝ ∣ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ (-∞(,)(𝑥 + 𝑦)) ∧ (𝑓‘𝑡) = 𝑦)}
419	414, 418	syl6eq 2660	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝑓 ∈ dom ∫1 → ((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ (-∞(,)(𝑥 + 𝑦))) ∩ (◡𝑓 “ {𝑦})) = {𝑡 ∈ ℝ ∣ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ (-∞(,)(𝑥 + 𝑦)) ∧ (𝑓‘𝑡) = 𝑦)})
420	419	ad3antlr 763	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ran 𝑓) → ((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ (-∞(,)(𝑥 + 𝑦))) ∩ (◡𝑓 “ {𝑦})) = {𝑡 ∈ ℝ ∣ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ (-∞(,)(𝑥 + 𝑦)) ∧ (𝑓‘𝑡) = 𝑦)})
421	406, 413, 420	3eqtr4d 2654	. . . . . . . . . . . . . . . . . . 19 ⊢ ((((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) ∧ 𝑦 ∈ ran 𝑓) → ((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ∩ (◡𝑓 “ {𝑦})) = ((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ (-∞(,)(𝑥 + 𝑦))) ∩ (◡𝑓 “ {𝑦})))
422	421	iuneq2dv 4478	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) → ∪ 𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ∩ (◡𝑓 “ {𝑦})) = ∪ 𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ (-∞(,)(𝑥 + 𝑦))) ∩ (◡𝑓 “ {𝑦})))
423	388, 422	eqtr3d 2646	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) → (◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) = ∪ 𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ (-∞(,)(𝑥 + 𝑦))) ∩ (◡𝑓 “ {𝑦})))
424		mbfima 23205	. . . . . . . . . . . . . . . . . . . . . 22 ⊢ (((𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) ∈ MblFn ∧ (𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))):ℝ⟶ℝ) → (◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ (-∞(,)(𝑥 + 𝑦))) ∈ dom vol)
425	366, 368, 424	syl2anc 691	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (𝜑 → (◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ (-∞(,)(𝑥 + 𝑦))) ∈ dom vol)
426		inmbl 23117	. . . . . . . . . . . . . . . . . . . . 21 ⊢ (((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ (-∞(,)(𝑥 + 𝑦))) ∈ dom vol ∧ (◡𝑓 “ {𝑦}) ∈ dom vol) → ((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ (-∞(,)(𝑥 + 𝑦))) ∩ (◡𝑓 “ {𝑦})) ∈ dom vol)
427	425, 371, 426	syl2an 493	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝜑 ∧ 𝑓 ∈ dom ∫1) → ((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ (-∞(,)(𝑥 + 𝑦))) ∩ (◡𝑓 “ {𝑦})) ∈ dom vol)
428	427	ralrimivw 2950	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝜑 ∧ 𝑓 ∈ dom ∫1) → ∀𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ (-∞(,)(𝑥 + 𝑦))) ∩ (◡𝑓 “ {𝑦})) ∈ dom vol)
429		finiunmbl 23119	. . . . . . . . . . . . . . . . . . 19 ⊢ ((ran 𝑓 ∈ Fin ∧ ∀𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ (-∞(,)(𝑥 + 𝑦))) ∩ (◡𝑓 “ {𝑦})) ∈ dom vol) → ∪ 𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ (-∞(,)(𝑥 + 𝑦))) ∩ (◡𝑓 “ {𝑦})) ∈ dom vol)
430	350, 428, 429	syl2anc 691	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝜑 ∧ 𝑓 ∈ dom ∫1) → ∪ 𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ (-∞(,)(𝑥 + 𝑦))) ∩ (◡𝑓 “ {𝑦})) ∈ dom vol)
431	430	adantr 480	. . . . . . . . . . . . . . . . 17 ⊢ (((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) → ∪ 𝑦 ∈ ran 𝑓((◡(𝑡 ∈ ℝ ↦ (ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) “ (-∞(,)(𝑥 + 𝑦))) ∩ (◡𝑓 “ {𝑦})) ∈ dom vol)
432	423, 431	eqeltrd 2688	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ 𝑥 ∈ ℝ) → (◡(𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) “ (-∞(,)𝑥)) ∈ dom vol)
433	270, 271, 378, 432	ismbf2d 23214	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ 𝑓 ∈ dom ∫1) → (𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) ∈ MblFn)
434		ftc1anclem1 32655	. . . . . . . . . . . . . . 15 ⊢ (((𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))):ℝ⟶ℝ ∧ (𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))) ∈ MblFn) → (abs ∘ (𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))) ∈ MblFn)
435	270, 433, 434	syl2anc 691	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑓 ∈ dom ∫1) → (abs ∘ (𝑡 ∈ ℝ ↦ ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))) ∈ MblFn)
436	265, 435	eqeltrrd 2689	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑓 ∈ dom ∫1) → (𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))) ∈ MblFn)
437	436	adantrr 749	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))) ∈ MblFn)
438	160	adantrr 749	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) ∈ ℝ)
439	178	adantrl 748	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) ∈ ℝ)
440	437, 223, 438, 230, 439	itg2addnc 32634	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (∫2‘((𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)))) ∘𝑓 + (𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))) = ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) + (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))))
441	259, 440	breqtrd 4609	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))) ≤ ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) + (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))))
442	441	adantlr 747	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑌 ∈ ℝ+) ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))) ≤ ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) + (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))))
443		itg2cl 23305	. . . . . . . . . . . 12 ⊢ ((𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))):ℝ⟶(0[,]+∞) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))) ∈ ℝ*)
444	212, 443	syl 17	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))) ∈ ℝ*)
445	444	adantlr 747	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑌 ∈ ℝ+) ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))) ∈ ℝ*)
446		readdcl 9898	. . . . . . . . . . . . . 14 ⊢ (((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) ∈ ℝ ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) ∈ ℝ) → ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) + (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))) ∈ ℝ)
447	160, 178, 446	syl2an 493	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ 𝑓 ∈ dom ∫1) ∧ (𝜑 ∧ 𝑔 ∈ dom ∫1)) → ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) + (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))) ∈ ℝ)
448	447	anandis 869	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) + (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))) ∈ ℝ)
449	448	rexrd 9968	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) + (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))) ∈ ℝ*)
450	449	adantlr 747	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑌 ∈ ℝ+) ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) + (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))) ∈ ℝ*)
451	1, 1	rpaddcld 11763	. . . . . . . . . . . 12 ⊢ (𝑌 ∈ ℝ+ → ((𝑌 / 2) + (𝑌 / 2)) ∈ ℝ+)
452	451	rpxrd 11749	. . . . . . . . . . 11 ⊢ (𝑌 ∈ ℝ+ → ((𝑌 / 2) + (𝑌 / 2)) ∈ ℝ*)
453	452	ad2antlr 759	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑌 ∈ ℝ+) ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → ((𝑌 / 2) + (𝑌 / 2)) ∈ ℝ*)
454		xrlelttr 11863	. . . . . . . . . 10 ⊢ (((∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))) ∈ ℝ* ∧ ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) + (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))) ∈ ℝ* ∧ ((𝑌 / 2) + (𝑌 / 2)) ∈ ℝ*) → (((∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))) ≤ ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) + (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))) ∧ ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) + (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))) < ((𝑌 / 2) + (𝑌 / 2))) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))) < ((𝑌 / 2) + (𝑌 / 2))))
455	445, 450, 453, 454	syl3anc 1318	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑌 ∈ ℝ+) ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (((∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))) ≤ ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) + (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))) ∧ ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) + (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))) < ((𝑌 / 2) + (𝑌 / 2))) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))) < ((𝑌 / 2) + (𝑌 / 2))))
456	442, 455	mpand 707	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑌 ∈ ℝ+) ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) + (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))) < ((𝑌 / 2) + (𝑌 / 2)) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))) < ((𝑌 / 2) + (𝑌 / 2))))
457	184, 456	syld 46	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑌 ∈ ℝ+) ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) < (𝑌 / 2) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) < (𝑌 / 2)) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))) < ((𝑌 / 2) + (𝑌 / 2))))
458		mulcl 9899	. . . . . . . . . . . . . . . . 17 ⊢ ((i ∈ ℂ ∧ (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℂ) → (i · (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) ∈ ℂ)
459	13, 195, 458	sylancr 694	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → (i · (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) ∈ ℂ)
460	186, 459	jca 553	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℂ ∧ (i · (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) ∈ ℂ))
461		mulcl 9899	. . . . . . . . . . . . . . . . . 18 ⊢ ((i ∈ ℂ ∧ (𝑔‘𝑡) ∈ ℂ) → (i · (𝑔‘𝑡)) ∈ ℂ)
462	13, 198, 461	sylancr 694	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑔 ∈ dom ∫1 ∧ 𝑡 ∈ ℝ) → (i · (𝑔‘𝑡)) ∈ ℂ)
463	189, 462	anim12i 588	. . . . . . . . . . . . . . . 16 ⊢ (((𝑓 ∈ dom ∫1 ∧ 𝑡 ∈ ℝ) ∧ (𝑔 ∈ dom ∫1 ∧ 𝑡 ∈ ℝ)) → ((𝑓‘𝑡) ∈ ℂ ∧ (i · (𝑔‘𝑡)) ∈ ℂ))
464	463	anandirs 870	. . . . . . . . . . . . . . 15 ⊢ (((𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ) → ((𝑓‘𝑡) ∈ ℂ ∧ (i · (𝑔‘𝑡)) ∈ ℂ))
465		addsub4 10203	. . . . . . . . . . . . . . 15 ⊢ ((((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℂ ∧ (i · (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) ∈ ℂ) ∧ ((𝑓‘𝑡) ∈ ℂ ∧ (i · (𝑔‘𝑡)) ∈ ℂ)) → (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) + (i · (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)))) − ((𝑓‘𝑡) + (i · (𝑔‘𝑡)))) = (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + ((i · (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) − (i · (𝑔‘𝑡)))))
466	460, 464, 465	syl2an 493	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ ((𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ)) → (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) + (i · (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)))) − ((𝑓‘𝑡) + (i · (𝑔‘𝑡)))) = (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + ((i · (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) − (i · (𝑔‘𝑡)))))
467	466	anassrs 678	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) ∧ 𝑡 ∈ ℝ) → (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) + (i · (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)))) − ((𝑓‘𝑡) + (i · (𝑔‘𝑡)))) = (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + ((i · (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) − (i · (𝑔‘𝑡)))))
468	94	replimd 13785	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) = ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) + (i · (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)))))
469	468	ad2antrr 758	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) ∧ 𝑡 ∈ ℝ) → if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) = ((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) + (i · (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)))))
470	469	oveq1d 6564	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) ∧ 𝑡 ∈ ℝ) → (if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) − ((𝑓‘𝑡) + (i · (𝑔‘𝑡)))) = (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) + (i · (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)))) − ((𝑓‘𝑡) + (i · (𝑔‘𝑡)))))
471	198	adantll 746	. . . . . . . . . . . . . . . 16 ⊢ (((𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ) → (𝑔‘𝑡) ∈ ℂ)
472		subdi 10342	. . . . . . . . . . . . . . . . 17 ⊢ ((i ∈ ℂ ∧ (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℂ ∧ (𝑔‘𝑡) ∈ ℂ) → (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))) = ((i · (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) − (i · (𝑔‘𝑡))))
473	13, 472	mp3an1 1403	. . . . . . . . . . . . . . . 16 ⊢ (((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) ∈ ℂ ∧ (𝑔‘𝑡) ∈ ℂ) → (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))) = ((i · (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) − (i · (𝑔‘𝑡))))
474	195, 471, 473	syl2an 493	. . . . . . . . . . . . . . 15 ⊢ ((𝜑 ∧ ((𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1) ∧ 𝑡 ∈ ℝ)) → (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))) = ((i · (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) − (i · (𝑔‘𝑡))))
475	474	anassrs 678	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) ∧ 𝑡 ∈ ℝ) → (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))) = ((i · (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) − (i · (𝑔‘𝑡))))
476	475	oveq2d 6565	. . . . . . . . . . . . 13 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) ∧ 𝑡 ∈ ℝ) → (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))) = (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + ((i · (ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0))) − (i · (𝑔‘𝑡)))))
477	467, 470, 476	3eqtr4rd 2655	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) ∧ 𝑡 ∈ ℝ) → (((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))) = (if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) − ((𝑓‘𝑡) + (i · (𝑔‘𝑡)))))
478	477	fveq2d 6107	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) ∧ 𝑡 ∈ ℝ) → (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) = (abs‘(if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) − ((𝑓‘𝑡) + (i · (𝑔‘𝑡))))))
479	478	mpteq2dva 4672	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡)))))) = (𝑡 ∈ ℝ ↦ (abs‘(if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) − ((𝑓‘𝑡) + (i · (𝑔‘𝑡)))))))
480	479	fveq2d 6107	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))) = (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) − ((𝑓‘𝑡) + (i · (𝑔‘𝑡))))))))
481	480	adantlr 747	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑌 ∈ ℝ+) ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))) = (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) − ((𝑓‘𝑡) + (i · (𝑔‘𝑡))))))))
482		rpcn 11717	. . . . . . . . . 10 ⊢ (𝑌 ∈ ℝ+ → 𝑌 ∈ ℂ)
483	482	2halvesd 11155	. . . . . . . . 9 ⊢ (𝑌 ∈ ℝ+ → ((𝑌 / 2) + (𝑌 / 2)) = 𝑌)
484	483	ad2antlr 759	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑌 ∈ ℝ+) ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → ((𝑌 / 2) + (𝑌 / 2)) = 𝑌)
485	481, 484	breq12d 4596	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑌 ∈ ℝ+) ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → ((∫2‘(𝑡 ∈ ℝ ↦ (abs‘(((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡)) + (i · ((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))))) < ((𝑌 / 2) + (𝑌 / 2)) ↔ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) − ((𝑓‘𝑡) + (i · (𝑔‘𝑡))))))) < 𝑌))
486	457, 485	sylibd 228	. . . . . 6 ⊢ (((𝜑 ∧ 𝑌 ∈ ℝ+) ∧ (𝑓 ∈ dom ∫1 ∧ 𝑔 ∈ dom ∫1)) → (((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) < (𝑌 / 2) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) < (𝑌 / 2)) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) − ((𝑓‘𝑡) + (i · (𝑔‘𝑡))))))) < 𝑌))
487	486	anassrs 678	. . . . 5 ⊢ ((((𝜑 ∧ 𝑌 ∈ ℝ+) ∧ 𝑓 ∈ dom ∫1) ∧ 𝑔 ∈ dom ∫1) → (((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) < (𝑌 / 2) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) < (𝑌 / 2)) → (∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) − ((𝑓‘𝑡) + (i · (𝑔‘𝑡))))))) < 𝑌))
488	487	reximdva 3000	. . . 4 ⊢ (((𝜑 ∧ 𝑌 ∈ ℝ+) ∧ 𝑓 ∈ dom ∫1) → (∃𝑔 ∈ dom ∫1((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) < (𝑌 / 2) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) < (𝑌 / 2)) → ∃𝑔 ∈ dom ∫1(∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) − ((𝑓‘𝑡) + (i · (𝑔‘𝑡))))))) < 𝑌))
489	488	reximdva 3000	. . 3 ⊢ ((𝜑 ∧ 𝑌 ∈ ℝ+) → (∃𝑓 ∈ dom ∫1∃𝑔 ∈ dom ∫1((∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) < (𝑌 / 2) ∧ (∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) < (𝑌 / 2)) → ∃𝑓 ∈ dom ∫1∃𝑔 ∈ dom ∫1(∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) − ((𝑓‘𝑡) + (i · (𝑔‘𝑡))))))) < 𝑌))
490	123, 489	syl5bir 232	. 2 ⊢ ((𝜑 ∧ 𝑌 ∈ ℝ+) → ((∃𝑓 ∈ dom ∫1(∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℜ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑓‘𝑡))))) < (𝑌 / 2) ∧ ∃𝑔 ∈ dom ∫1(∫2‘(𝑡 ∈ ℝ ↦ (abs‘((ℑ‘if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0)) − (𝑔‘𝑡))))) < (𝑌 / 2)) → ∃𝑓 ∈ dom ∫1∃𝑔 ∈ dom ∫1(∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) − ((𝑓‘𝑡) + (i · (𝑔‘𝑡))))))) < 𝑌))
491	11, 122, 490	mp2and 711	1 ⊢ ((𝜑 ∧ 𝑌 ∈ ℝ+) → ∃𝑓 ∈ dom ∫1∃𝑔 ∈ dom ∫1(∫2‘(𝑡 ∈ ℝ ↦ (abs‘(if(𝑡 ∈ 𝐷, (𝐹‘𝑡), 0) − ((𝑓‘𝑡) + (i · (𝑔‘𝑡))))))) < 𝑌)

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 195   ∧ wa 383   ∧ w3a 1031   = wceq 1475   ∈ wcel 1977   ≠ wne 2780  ∀wral 2896  ∃wrex 2897  {crab 2900  Vcvv 3173   ∖ cdif 3537   ∩ cin 3539   ⊆ wss 3540  ifcif 4036  {csn 4125  ∪ ciun 4455   class class class wbr 4583   ↦ cmpt 4643  ^◡ccnv 5037  dom cdm 5038  ran crn 5039   “ cima 5041   ∘ ccom 5042  ⟶wf 5800  ‘cfv 5804  (class class class)co 6549   ∘_𝑓 cof 6793   ∘_𝑟 cofr 6794  Fincfn 7841  ℂcc 9813  ℝcr 9814  0cc0 9815  1c1 9816  ici 9817   + caddc 9818   · cmul 9820  +∞cpnf 9950  -∞cmnf 9951  ℝ^*cxr 9952   < clt 9953   ≤ cle 9954   − cmin 10145  -cneg 10146   / cdiv 10563  2c2 10947  ℝ⁺crp 11708  (,)cioo 12046  [,)cico 12048  [,]cicc 12049  ℜcre 13685  ℑcim 13686  abscabs 13822  volcvol 23039  MblFncmbf 23189  ∫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-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-ovol 23040  df-vol 23041  df-mbf 23194  df-itg1 23195  df-itg2 23196  df-ibl 23197  df-0p 23243

This theorem is referenced by:  ftc1anc  32663