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Theorem itg2i1fseqle 23327
 Description: Subject to the conditions coming from mbfi1fseq 23294, the sequence of simple functions are all less than the target function 𝐹. (Contributed by Mario Carneiro, 17-Aug-2014.)
Hypotheses
Ref Expression
itg2i1fseq.1 (𝜑𝐹 ∈ MblFn)
itg2i1fseq.2 (𝜑𝐹:ℝ⟶(0[,)+∞))
itg2i1fseq.3 (𝜑𝑃:ℕ⟶dom ∫1)
itg2i1fseq.4 (𝜑 → ∀𝑛 ∈ ℕ (0𝑝𝑟 ≤ (𝑃𝑛) ∧ (𝑃𝑛) ∘𝑟 ≤ (𝑃‘(𝑛 + 1))))
itg2i1fseq.5 (𝜑 → ∀𝑥 ∈ ℝ (𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑥)) ⇝ (𝐹𝑥))
Assertion
Ref Expression
itg2i1fseqle ((𝜑𝑀 ∈ ℕ) → (𝑃𝑀) ∘𝑟𝐹)
Distinct variable groups:   𝑥,𝑛,𝐹   𝑛,𝑀   𝑃,𝑛,𝑥
Allowed substitution hints:   𝜑(𝑥,𝑛)   𝑀(𝑥)

Proof of Theorem itg2i1fseqle
Dummy variables 𝑘 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 fveq2 6103 . . . . . . 7 (𝑛 = 𝑀 → (𝑃𝑛) = (𝑃𝑀))
21fveq1d 6105 . . . . . 6 (𝑛 = 𝑀 → ((𝑃𝑛)‘𝑦) = ((𝑃𝑀)‘𝑦))
3 eqid 2610 . . . . . 6 (𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦)) = (𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))
4 fvex 6113 . . . . . 6 ((𝑃𝑀)‘𝑦) ∈ V
52, 3, 4fvmpt 6191 . . . . 5 (𝑀 ∈ ℕ → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘𝑀) = ((𝑃𝑀)‘𝑦))
65ad2antlr 759 . . . 4 (((𝜑𝑀 ∈ ℕ) ∧ 𝑦 ∈ ℝ) → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘𝑀) = ((𝑃𝑀)‘𝑦))
7 nnuz 11599 . . . . 5 ℕ = (ℤ‘1)
8 simplr 788 . . . . 5 (((𝜑𝑀 ∈ ℕ) ∧ 𝑦 ∈ ℝ) → 𝑀 ∈ ℕ)
9 itg2i1fseq.5 . . . . . . 7 (𝜑 → ∀𝑥 ∈ ℝ (𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑥)) ⇝ (𝐹𝑥))
10 fveq2 6103 . . . . . . . . . 10 (𝑥 = 𝑦 → ((𝑃𝑛)‘𝑥) = ((𝑃𝑛)‘𝑦))
1110mpteq2dv 4673 . . . . . . . . 9 (𝑥 = 𝑦 → (𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑥)) = (𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦)))
12 fveq2 6103 . . . . . . . . 9 (𝑥 = 𝑦 → (𝐹𝑥) = (𝐹𝑦))
1311, 12breq12d 4596 . . . . . . . 8 (𝑥 = 𝑦 → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑥)) ⇝ (𝐹𝑥) ↔ (𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦)) ⇝ (𝐹𝑦)))
1413rspccva 3281 . . . . . . 7 ((∀𝑥 ∈ ℝ (𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑥)) ⇝ (𝐹𝑥) ∧ 𝑦 ∈ ℝ) → (𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦)) ⇝ (𝐹𝑦))
159, 14sylan 487 . . . . . 6 ((𝜑𝑦 ∈ ℝ) → (𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦)) ⇝ (𝐹𝑦))
1615adantlr 747 . . . . 5 (((𝜑𝑀 ∈ ℕ) ∧ 𝑦 ∈ ℝ) → (𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦)) ⇝ (𝐹𝑦))
17 fveq2 6103 . . . . . . . . . 10 (𝑛 = 𝑘 → (𝑃𝑛) = (𝑃𝑘))
1817fveq1d 6105 . . . . . . . . 9 (𝑛 = 𝑘 → ((𝑃𝑛)‘𝑦) = ((𝑃𝑘)‘𝑦))
19 fvex 6113 . . . . . . . . 9 ((𝑃𝑘)‘𝑦) ∈ V
2018, 3, 19fvmpt 6191 . . . . . . . 8 (𝑘 ∈ ℕ → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘𝑘) = ((𝑃𝑘)‘𝑦))
2120adantl 481 . . . . . . 7 (((𝜑𝑦 ∈ ℝ) ∧ 𝑘 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘𝑘) = ((𝑃𝑘)‘𝑦))
22 itg2i1fseq.3 . . . . . . . . . . 11 (𝜑𝑃:ℕ⟶dom ∫1)
2322ffvelrnda 6267 . . . . . . . . . 10 ((𝜑𝑘 ∈ ℕ) → (𝑃𝑘) ∈ dom ∫1)
24 i1ff 23249 . . . . . . . . . 10 ((𝑃𝑘) ∈ dom ∫1 → (𝑃𝑘):ℝ⟶ℝ)
2523, 24syl 17 . . . . . . . . 9 ((𝜑𝑘 ∈ ℕ) → (𝑃𝑘):ℝ⟶ℝ)
2625ffvelrnda 6267 . . . . . . . 8 (((𝜑𝑘 ∈ ℕ) ∧ 𝑦 ∈ ℝ) → ((𝑃𝑘)‘𝑦) ∈ ℝ)
2726an32s 842 . . . . . . 7 (((𝜑𝑦 ∈ ℝ) ∧ 𝑘 ∈ ℕ) → ((𝑃𝑘)‘𝑦) ∈ ℝ)
2821, 27eqeltrd 2688 . . . . . 6 (((𝜑𝑦 ∈ ℝ) ∧ 𝑘 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘𝑘) ∈ ℝ)
2928adantllr 751 . . . . 5 ((((𝜑𝑀 ∈ ℕ) ∧ 𝑦 ∈ ℝ) ∧ 𝑘 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘𝑘) ∈ ℝ)
30 itg2i1fseq.4 . . . . . . . . . . . 12 (𝜑 → ∀𝑛 ∈ ℕ (0𝑝𝑟 ≤ (𝑃𝑛) ∧ (𝑃𝑛) ∘𝑟 ≤ (𝑃‘(𝑛 + 1))))
31 simpr 476 . . . . . . . . . . . . 13 ((0𝑝𝑟 ≤ (𝑃𝑛) ∧ (𝑃𝑛) ∘𝑟 ≤ (𝑃‘(𝑛 + 1))) → (𝑃𝑛) ∘𝑟 ≤ (𝑃‘(𝑛 + 1)))
3231ralimi 2936 . . . . . . . . . . . 12 (∀𝑛 ∈ ℕ (0𝑝𝑟 ≤ (𝑃𝑛) ∧ (𝑃𝑛) ∘𝑟 ≤ (𝑃‘(𝑛 + 1))) → ∀𝑛 ∈ ℕ (𝑃𝑛) ∘𝑟 ≤ (𝑃‘(𝑛 + 1)))
3330, 32syl 17 . . . . . . . . . . 11 (𝜑 → ∀𝑛 ∈ ℕ (𝑃𝑛) ∘𝑟 ≤ (𝑃‘(𝑛 + 1)))
34 oveq1 6556 . . . . . . . . . . . . . 14 (𝑛 = 𝑘 → (𝑛 + 1) = (𝑘 + 1))
3534fveq2d 6107 . . . . . . . . . . . . 13 (𝑛 = 𝑘 → (𝑃‘(𝑛 + 1)) = (𝑃‘(𝑘 + 1)))
3617, 35breq12d 4596 . . . . . . . . . . . 12 (𝑛 = 𝑘 → ((𝑃𝑛) ∘𝑟 ≤ (𝑃‘(𝑛 + 1)) ↔ (𝑃𝑘) ∘𝑟 ≤ (𝑃‘(𝑘 + 1))))
3736rspccva 3281 . . . . . . . . . . 11 ((∀𝑛 ∈ ℕ (𝑃𝑛) ∘𝑟 ≤ (𝑃‘(𝑛 + 1)) ∧ 𝑘 ∈ ℕ) → (𝑃𝑘) ∘𝑟 ≤ (𝑃‘(𝑘 + 1)))
3833, 37sylan 487 . . . . . . . . . 10 ((𝜑𝑘 ∈ ℕ) → (𝑃𝑘) ∘𝑟 ≤ (𝑃‘(𝑘 + 1)))
39 ffn 5958 . . . . . . . . . . . 12 ((𝑃𝑘):ℝ⟶ℝ → (𝑃𝑘) Fn ℝ)
4023, 24, 393syl 18 . . . . . . . . . . 11 ((𝜑𝑘 ∈ ℕ) → (𝑃𝑘) Fn ℝ)
41 peano2nn 10909 . . . . . . . . . . . . 13 (𝑘 ∈ ℕ → (𝑘 + 1) ∈ ℕ)
42 ffvelrn 6265 . . . . . . . . . . . . 13 ((𝑃:ℕ⟶dom ∫1 ∧ (𝑘 + 1) ∈ ℕ) → (𝑃‘(𝑘 + 1)) ∈ dom ∫1)
4322, 41, 42syl2an 493 . . . . . . . . . . . 12 ((𝜑𝑘 ∈ ℕ) → (𝑃‘(𝑘 + 1)) ∈ dom ∫1)
44 i1ff 23249 . . . . . . . . . . . 12 ((𝑃‘(𝑘 + 1)) ∈ dom ∫1 → (𝑃‘(𝑘 + 1)):ℝ⟶ℝ)
45 ffn 5958 . . . . . . . . . . . 12 ((𝑃‘(𝑘 + 1)):ℝ⟶ℝ → (𝑃‘(𝑘 + 1)) Fn ℝ)
4643, 44, 453syl 18 . . . . . . . . . . 11 ((𝜑𝑘 ∈ ℕ) → (𝑃‘(𝑘 + 1)) Fn ℝ)
47 reex 9906 . . . . . . . . . . . 12 ℝ ∈ V
4847a1i 11 . . . . . . . . . . 11 ((𝜑𝑘 ∈ ℕ) → ℝ ∈ V)
49 inidm 3784 . . . . . . . . . . 11 (ℝ ∩ ℝ) = ℝ
50 eqidd 2611 . . . . . . . . . . 11 (((𝜑𝑘 ∈ ℕ) ∧ 𝑦 ∈ ℝ) → ((𝑃𝑘)‘𝑦) = ((𝑃𝑘)‘𝑦))
51 eqidd 2611 . . . . . . . . . . 11 (((𝜑𝑘 ∈ ℕ) ∧ 𝑦 ∈ ℝ) → ((𝑃‘(𝑘 + 1))‘𝑦) = ((𝑃‘(𝑘 + 1))‘𝑦))
5240, 46, 48, 48, 49, 50, 51ofrfval 6803 . . . . . . . . . 10 ((𝜑𝑘 ∈ ℕ) → ((𝑃𝑘) ∘𝑟 ≤ (𝑃‘(𝑘 + 1)) ↔ ∀𝑦 ∈ ℝ ((𝑃𝑘)‘𝑦) ≤ ((𝑃‘(𝑘 + 1))‘𝑦)))
5338, 52mpbid 221 . . . . . . . . 9 ((𝜑𝑘 ∈ ℕ) → ∀𝑦 ∈ ℝ ((𝑃𝑘)‘𝑦) ≤ ((𝑃‘(𝑘 + 1))‘𝑦))
5453r19.21bi 2916 . . . . . . . 8 (((𝜑𝑘 ∈ ℕ) ∧ 𝑦 ∈ ℝ) → ((𝑃𝑘)‘𝑦) ≤ ((𝑃‘(𝑘 + 1))‘𝑦))
5554an32s 842 . . . . . . 7 (((𝜑𝑦 ∈ ℝ) ∧ 𝑘 ∈ ℕ) → ((𝑃𝑘)‘𝑦) ≤ ((𝑃‘(𝑘 + 1))‘𝑦))
56 fveq2 6103 . . . . . . . . . . 11 (𝑛 = (𝑘 + 1) → (𝑃𝑛) = (𝑃‘(𝑘 + 1)))
5756fveq1d 6105 . . . . . . . . . 10 (𝑛 = (𝑘 + 1) → ((𝑃𝑛)‘𝑦) = ((𝑃‘(𝑘 + 1))‘𝑦))
58 fvex 6113 . . . . . . . . . 10 ((𝑃‘(𝑘 + 1))‘𝑦) ∈ V
5957, 3, 58fvmpt 6191 . . . . . . . . 9 ((𝑘 + 1) ∈ ℕ → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘(𝑘 + 1)) = ((𝑃‘(𝑘 + 1))‘𝑦))
6041, 59syl 17 . . . . . . . 8 (𝑘 ∈ ℕ → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘(𝑘 + 1)) = ((𝑃‘(𝑘 + 1))‘𝑦))
6160adantl 481 . . . . . . 7 (((𝜑𝑦 ∈ ℝ) ∧ 𝑘 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘(𝑘 + 1)) = ((𝑃‘(𝑘 + 1))‘𝑦))
6255, 21, 613brtr4d 4615 . . . . . 6 (((𝜑𝑦 ∈ ℝ) ∧ 𝑘 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘𝑘) ≤ ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘(𝑘 + 1)))
6362adantllr 751 . . . . 5 ((((𝜑𝑀 ∈ ℕ) ∧ 𝑦 ∈ ℝ) ∧ 𝑘 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘𝑘) ≤ ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘(𝑘 + 1)))
647, 8, 16, 29, 63climub 14240 . . . 4 (((𝜑𝑀 ∈ ℕ) ∧ 𝑦 ∈ ℝ) → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘𝑀) ≤ (𝐹𝑦))
656, 64eqbrtrrd 4607 . . 3 (((𝜑𝑀 ∈ ℕ) ∧ 𝑦 ∈ ℝ) → ((𝑃𝑀)‘𝑦) ≤ (𝐹𝑦))
6665ralrimiva 2949 . 2 ((𝜑𝑀 ∈ ℕ) → ∀𝑦 ∈ ℝ ((𝑃𝑀)‘𝑦) ≤ (𝐹𝑦))
6722ffvelrnda 6267 . . . 4 ((𝜑𝑀 ∈ ℕ) → (𝑃𝑀) ∈ dom ∫1)
68 i1ff 23249 . . . 4 ((𝑃𝑀) ∈ dom ∫1 → (𝑃𝑀):ℝ⟶ℝ)
69 ffn 5958 . . . 4 ((𝑃𝑀):ℝ⟶ℝ → (𝑃𝑀) Fn ℝ)
7067, 68, 693syl 18 . . 3 ((𝜑𝑀 ∈ ℕ) → (𝑃𝑀) Fn ℝ)
71 itg2i1fseq.2 . . . . . 6 (𝜑𝐹:ℝ⟶(0[,)+∞))
72 icossicc 12131 . . . . . 6 (0[,)+∞) ⊆ (0[,]+∞)
73 fss 5969 . . . . . 6 ((𝐹:ℝ⟶(0[,)+∞) ∧ (0[,)+∞) ⊆ (0[,]+∞)) → 𝐹:ℝ⟶(0[,]+∞))
7471, 72, 73sylancl 693 . . . . 5 (𝜑𝐹:ℝ⟶(0[,]+∞))
75 ffn 5958 . . . . 5 (𝐹:ℝ⟶(0[,]+∞) → 𝐹 Fn ℝ)
7674, 75syl 17 . . . 4 (𝜑𝐹 Fn ℝ)
7776adantr 480 . . 3 ((𝜑𝑀 ∈ ℕ) → 𝐹 Fn ℝ)
7847a1i 11 . . 3 ((𝜑𝑀 ∈ ℕ) → ℝ ∈ V)
79 eqidd 2611 . . 3 (((𝜑𝑀 ∈ ℕ) ∧ 𝑦 ∈ ℝ) → ((𝑃𝑀)‘𝑦) = ((𝑃𝑀)‘𝑦))
80 eqidd 2611 . . 3 (((𝜑𝑀 ∈ ℕ) ∧ 𝑦 ∈ ℝ) → (𝐹𝑦) = (𝐹𝑦))
8170, 77, 78, 78, 49, 79, 80ofrfval 6803 . 2 ((𝜑𝑀 ∈ ℕ) → ((𝑃𝑀) ∘𝑟𝐹 ↔ ∀𝑦 ∈ ℝ ((𝑃𝑀)‘𝑦) ≤ (𝐹𝑦)))
8266, 81mpbird 246 1 ((𝜑𝑀 ∈ ℕ) → (𝑃𝑀) ∘𝑟𝐹)
 Colors of variables: wff setvar class Syntax hints:   → wi 4   ∧ wa 383   = wceq 1475   ∈ wcel 1977  ∀wral 2896  Vcvv 3173   ⊆ wss 3540   class class class wbr 4583   ↦ cmpt 4643  dom cdm 5038   Fn wfn 5799  ⟶wf 5800  ‘cfv 5804  (class class class)co 6549   ∘𝑟 cofr 6794  ℝcr 9814  0cc0 9815  1c1 9816   + caddc 9818  +∞cpnf 9950   ≤ cle 9954  ℕcn 10897  [,)cico 12048  [,]cicc 12049   ⇝ cli 14063  MblFncmbf 23189  ∫1citg1 23190  0𝑝c0p 23242 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-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 This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  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-iun 4457  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-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-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-ofr 6796  df-om 6958  df-1st 7059  df-2nd 7060  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-er 7629  df-pm 7747  df-en 7842  df-dom 7843  df-sdom 7844  df-sup 8231  df-inf 8232  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-n0 11170  df-z 11255  df-uz 11564  df-rp 11709  df-ico 12052  df-icc 12053  df-fz 12198  df-fl 12455  df-seq 12664  df-exp 12723  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-itg1 23195 This theorem is referenced by:  itg2i1fseq  23328  itg2i1fseq3  23330  itg2addlem  23331
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