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Theorem itg2i1fseqle 23521
Description: Subject to the conditions coming from mbfi1fseq 23488, 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 6191 . . . . . . 7 (𝑛 = 𝑀 → (𝑃𝑛) = (𝑃𝑀))
21fveq1d 6193 . . . . . 6 (𝑛 = 𝑀 → ((𝑃𝑛)‘𝑦) = ((𝑃𝑀)‘𝑦))
3 eqid 2622 . . . . . 6 (𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦)) = (𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))
4 fvex 6201 . . . . . 6 ((𝑃𝑀)‘𝑦) ∈ V
52, 3, 4fvmpt 6282 . . . . 5 (𝑀 ∈ ℕ → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘𝑀) = ((𝑃𝑀)‘𝑦))
65ad2antlr 763 . . . 4 (((𝜑𝑀 ∈ ℕ) ∧ 𝑦 ∈ ℝ) → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘𝑀) = ((𝑃𝑀)‘𝑦))
7 nnuz 11723 . . . . 5 ℕ = (ℤ‘1)
8 simplr 792 . . . . 5 (((𝜑𝑀 ∈ ℕ) ∧ 𝑦 ∈ ℝ) → 𝑀 ∈ ℕ)
9 itg2i1fseq.5 . . . . . . 7 (𝜑 → ∀𝑥 ∈ ℝ (𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑥)) ⇝ (𝐹𝑥))
10 fveq2 6191 . . . . . . . . . 10 (𝑥 = 𝑦 → ((𝑃𝑛)‘𝑥) = ((𝑃𝑛)‘𝑦))
1110mpteq2dv 4745 . . . . . . . . 9 (𝑥 = 𝑦 → (𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑥)) = (𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦)))
12 fveq2 6191 . . . . . . . . 9 (𝑥 = 𝑦 → (𝐹𝑥) = (𝐹𝑦))
1311, 12breq12d 4666 . . . . . . . 8 (𝑥 = 𝑦 → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑥)) ⇝ (𝐹𝑥) ↔ (𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦)) ⇝ (𝐹𝑦)))
1413rspccva 3308 . . . . . . 7 ((∀𝑥 ∈ ℝ (𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑥)) ⇝ (𝐹𝑥) ∧ 𝑦 ∈ ℝ) → (𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦)) ⇝ (𝐹𝑦))
159, 14sylan 488 . . . . . 6 ((𝜑𝑦 ∈ ℝ) → (𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦)) ⇝ (𝐹𝑦))
1615adantlr 751 . . . . 5 (((𝜑𝑀 ∈ ℕ) ∧ 𝑦 ∈ ℝ) → (𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦)) ⇝ (𝐹𝑦))
17 fveq2 6191 . . . . . . . . . 10 (𝑛 = 𝑘 → (𝑃𝑛) = (𝑃𝑘))
1817fveq1d 6193 . . . . . . . . 9 (𝑛 = 𝑘 → ((𝑃𝑛)‘𝑦) = ((𝑃𝑘)‘𝑦))
19 fvex 6201 . . . . . . . . 9 ((𝑃𝑘)‘𝑦) ∈ V
2018, 3, 19fvmpt 6282 . . . . . . . 8 (𝑘 ∈ ℕ → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘𝑘) = ((𝑃𝑘)‘𝑦))
2120adantl 482 . . . . . . 7 (((𝜑𝑦 ∈ ℝ) ∧ 𝑘 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘𝑘) = ((𝑃𝑘)‘𝑦))
22 itg2i1fseq.3 . . . . . . . . . . 11 (𝜑𝑃:ℕ⟶dom ∫1)
2322ffvelrnda 6359 . . . . . . . . . 10 ((𝜑𝑘 ∈ ℕ) → (𝑃𝑘) ∈ dom ∫1)
24 i1ff 23443 . . . . . . . . . 10 ((𝑃𝑘) ∈ dom ∫1 → (𝑃𝑘):ℝ⟶ℝ)
2523, 24syl 17 . . . . . . . . 9 ((𝜑𝑘 ∈ ℕ) → (𝑃𝑘):ℝ⟶ℝ)
2625ffvelrnda 6359 . . . . . . . 8 (((𝜑𝑘 ∈ ℕ) ∧ 𝑦 ∈ ℝ) → ((𝑃𝑘)‘𝑦) ∈ ℝ)
2726an32s 846 . . . . . . 7 (((𝜑𝑦 ∈ ℝ) ∧ 𝑘 ∈ ℕ) → ((𝑃𝑘)‘𝑦) ∈ ℝ)
2821, 27eqeltrd 2701 . . . . . 6 (((𝜑𝑦 ∈ ℝ) ∧ 𝑘 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘𝑘) ∈ ℝ)
2928adantllr 755 . . . . 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 477 . . . . . . . . . . . . 13 ((0𝑝𝑟 ≤ (𝑃𝑛) ∧ (𝑃𝑛) ∘𝑟 ≤ (𝑃‘(𝑛 + 1))) → (𝑃𝑛) ∘𝑟 ≤ (𝑃‘(𝑛 + 1)))
3231ralimi 2952 . . . . . . . . . . . 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 6657 . . . . . . . . . . . . . 14 (𝑛 = 𝑘 → (𝑛 + 1) = (𝑘 + 1))
3534fveq2d 6195 . . . . . . . . . . . . 13 (𝑛 = 𝑘 → (𝑃‘(𝑛 + 1)) = (𝑃‘(𝑘 + 1)))
3617, 35breq12d 4666 . . . . . . . . . . . 12 (𝑛 = 𝑘 → ((𝑃𝑛) ∘𝑟 ≤ (𝑃‘(𝑛 + 1)) ↔ (𝑃𝑘) ∘𝑟 ≤ (𝑃‘(𝑘 + 1))))
3736rspccva 3308 . . . . . . . . . . 11 ((∀𝑛 ∈ ℕ (𝑃𝑛) ∘𝑟 ≤ (𝑃‘(𝑛 + 1)) ∧ 𝑘 ∈ ℕ) → (𝑃𝑘) ∘𝑟 ≤ (𝑃‘(𝑘 + 1)))
3833, 37sylan 488 . . . . . . . . . 10 ((𝜑𝑘 ∈ ℕ) → (𝑃𝑘) ∘𝑟 ≤ (𝑃‘(𝑘 + 1)))
39 ffn 6045 . . . . . . . . . . . 12 ((𝑃𝑘):ℝ⟶ℝ → (𝑃𝑘) Fn ℝ)
4023, 24, 393syl 18 . . . . . . . . . . 11 ((𝜑𝑘 ∈ ℕ) → (𝑃𝑘) Fn ℝ)
41 peano2nn 11032 . . . . . . . . . . . . 13 (𝑘 ∈ ℕ → (𝑘 + 1) ∈ ℕ)
42 ffvelrn 6357 . . . . . . . . . . . . 13 ((𝑃:ℕ⟶dom ∫1 ∧ (𝑘 + 1) ∈ ℕ) → (𝑃‘(𝑘 + 1)) ∈ dom ∫1)
4322, 41, 42syl2an 494 . . . . . . . . . . . 12 ((𝜑𝑘 ∈ ℕ) → (𝑃‘(𝑘 + 1)) ∈ dom ∫1)
44 i1ff 23443 . . . . . . . . . . . 12 ((𝑃‘(𝑘 + 1)) ∈ dom ∫1 → (𝑃‘(𝑘 + 1)):ℝ⟶ℝ)
45 ffn 6045 . . . . . . . . . . . 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 10027 . . . . . . . . . . . 12 ℝ ∈ V
4847a1i 11 . . . . . . . . . . 11 ((𝜑𝑘 ∈ ℕ) → ℝ ∈ V)
49 inidm 3822 . . . . . . . . . . 11 (ℝ ∩ ℝ) = ℝ
50 eqidd 2623 . . . . . . . . . . 11 (((𝜑𝑘 ∈ ℕ) ∧ 𝑦 ∈ ℝ) → ((𝑃𝑘)‘𝑦) = ((𝑃𝑘)‘𝑦))
51 eqidd 2623 . . . . . . . . . . 11 (((𝜑𝑘 ∈ ℕ) ∧ 𝑦 ∈ ℝ) → ((𝑃‘(𝑘 + 1))‘𝑦) = ((𝑃‘(𝑘 + 1))‘𝑦))
5240, 46, 48, 48, 49, 50, 51ofrfval 6905 . . . . . . . . . 10 ((𝜑𝑘 ∈ ℕ) → ((𝑃𝑘) ∘𝑟 ≤ (𝑃‘(𝑘 + 1)) ↔ ∀𝑦 ∈ ℝ ((𝑃𝑘)‘𝑦) ≤ ((𝑃‘(𝑘 + 1))‘𝑦)))
5338, 52mpbid 222 . . . . . . . . 9 ((𝜑𝑘 ∈ ℕ) → ∀𝑦 ∈ ℝ ((𝑃𝑘)‘𝑦) ≤ ((𝑃‘(𝑘 + 1))‘𝑦))
5453r19.21bi 2932 . . . . . . . 8 (((𝜑𝑘 ∈ ℕ) ∧ 𝑦 ∈ ℝ) → ((𝑃𝑘)‘𝑦) ≤ ((𝑃‘(𝑘 + 1))‘𝑦))
5554an32s 846 . . . . . . 7 (((𝜑𝑦 ∈ ℝ) ∧ 𝑘 ∈ ℕ) → ((𝑃𝑘)‘𝑦) ≤ ((𝑃‘(𝑘 + 1))‘𝑦))
56 fveq2 6191 . . . . . . . . . . 11 (𝑛 = (𝑘 + 1) → (𝑃𝑛) = (𝑃‘(𝑘 + 1)))
5756fveq1d 6193 . . . . . . . . . 10 (𝑛 = (𝑘 + 1) → ((𝑃𝑛)‘𝑦) = ((𝑃‘(𝑘 + 1))‘𝑦))
58 fvex 6201 . . . . . . . . . 10 ((𝑃‘(𝑘 + 1))‘𝑦) ∈ V
5957, 3, 58fvmpt 6282 . . . . . . . . 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 482 . . . . . . 7 (((𝜑𝑦 ∈ ℝ) ∧ 𝑘 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘(𝑘 + 1)) = ((𝑃‘(𝑘 + 1))‘𝑦))
6255, 21, 613brtr4d 4685 . . . . . 6 (((𝜑𝑦 ∈ ℝ) ∧ 𝑘 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘𝑘) ≤ ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘(𝑘 + 1)))
6362adantllr 755 . . . . 5 ((((𝜑𝑀 ∈ ℕ) ∧ 𝑦 ∈ ℝ) ∧ 𝑘 ∈ ℕ) → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘𝑘) ≤ ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘(𝑘 + 1)))
647, 8, 16, 29, 63climub 14392 . . . 4 (((𝜑𝑀 ∈ ℕ) ∧ 𝑦 ∈ ℝ) → ((𝑛 ∈ ℕ ↦ ((𝑃𝑛)‘𝑦))‘𝑀) ≤ (𝐹𝑦))
656, 64eqbrtrrd 4677 . . 3 (((𝜑𝑀 ∈ ℕ) ∧ 𝑦 ∈ ℝ) → ((𝑃𝑀)‘𝑦) ≤ (𝐹𝑦))
6665ralrimiva 2966 . 2 ((𝜑𝑀 ∈ ℕ) → ∀𝑦 ∈ ℝ ((𝑃𝑀)‘𝑦) ≤ (𝐹𝑦))
6722ffvelrnda 6359 . . . 4 ((𝜑𝑀 ∈ ℕ) → (𝑃𝑀) ∈ dom ∫1)
68 i1ff 23443 . . . 4 ((𝑃𝑀) ∈ dom ∫1 → (𝑃𝑀):ℝ⟶ℝ)
69 ffn 6045 . . . 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 12260 . . . . . 6 (0[,)+∞) ⊆ (0[,]+∞)
73 fss 6056 . . . . . 6 ((𝐹:ℝ⟶(0[,)+∞) ∧ (0[,)+∞) ⊆ (0[,]+∞)) → 𝐹:ℝ⟶(0[,]+∞))
7471, 72, 73sylancl 694 . . . . 5 (𝜑𝐹:ℝ⟶(0[,]+∞))
75 ffn 6045 . . . . 5 (𝐹:ℝ⟶(0[,]+∞) → 𝐹 Fn ℝ)
7674, 75syl 17 . . . 4 (𝜑𝐹 Fn ℝ)
7776adantr 481 . . 3 ((𝜑𝑀 ∈ ℕ) → 𝐹 Fn ℝ)
7847a1i 11 . . 3 ((𝜑𝑀 ∈ ℕ) → ℝ ∈ V)
79 eqidd 2623 . . 3 (((𝜑𝑀 ∈ ℕ) ∧ 𝑦 ∈ ℝ) → ((𝑃𝑀)‘𝑦) = ((𝑃𝑀)‘𝑦))
80 eqidd 2623 . . 3 (((𝜑𝑀 ∈ ℕ) ∧ 𝑦 ∈ ℝ) → (𝐹𝑦) = (𝐹𝑦))
8170, 77, 78, 78, 49, 79, 80ofrfval 6905 . 2 ((𝜑𝑀 ∈ ℕ) → ((𝑃𝑀) ∘𝑟𝐹 ↔ ∀𝑦 ∈ ℝ ((𝑃𝑀)‘𝑦) ≤ (𝐹𝑦)))
8266, 81mpbird 247 1 ((𝜑𝑀 ∈ ℕ) → (𝑃𝑀) ∘𝑟𝐹)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 384   = wceq 1483  wcel 1990  wral 2912  Vcvv 3200  wss 3574   class class class wbr 4653  cmpt 4729  dom cdm 5114   Fn wfn 5883  wf 5884  cfv 5888  (class class class)co 6650  𝑟 cofr 6896  cr 9935  0cc0 9936  1c1 9937   + caddc 9939  +∞cpnf 10071  cle 10075  cn 11020  [,)cico 12177  [,]cicc 12178  cli 14215  MblFncmbf 23383  1citg1 23384  0𝑝c0p 23436
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949  ax-cnex 9992  ax-resscn 9993  ax-1cn 9994  ax-icn 9995  ax-addcl 9996  ax-addrcl 9997  ax-mulcl 9998  ax-mulrcl 9999  ax-mulcom 10000  ax-addass 10001  ax-mulass 10002  ax-distr 10003  ax-i2m1 10004  ax-1ne0 10005  ax-1rid 10006  ax-rnegex 10007  ax-rrecex 10008  ax-cnre 10009  ax-pre-lttri 10010  ax-pre-lttrn 10011  ax-pre-ltadd 10012  ax-pre-mulgt0 10013  ax-pre-sup 10014
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1038  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-nel 2898  df-ral 2917  df-rex 2918  df-reu 2919  df-rmo 2920  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-pss 3590  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-tp 4182  df-op 4184  df-uni 4437  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-tr 4753  df-id 5024  df-eprel 5029  df-po 5035  df-so 5036  df-fr 5073  df-we 5075  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-pred 5680  df-ord 5726  df-on 5727  df-lim 5728  df-suc 5729  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-riota 6611  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-ofr 6898  df-om 7066  df-1st 7168  df-2nd 7169  df-wrecs 7407  df-recs 7468  df-rdg 7506  df-er 7742  df-pm 7860  df-en 7956  df-dom 7957  df-sdom 7958  df-sup 8348  df-inf 8349  df-pnf 10076  df-mnf 10077  df-xr 10078  df-ltxr 10079  df-le 10080  df-sub 10268  df-neg 10269  df-div 10685  df-nn 11021  df-2 11079  df-3 11080  df-n0 11293  df-z 11378  df-uz 11688  df-rp 11833  df-ico 12181  df-icc 12182  df-fz 12327  df-fl 12593  df-seq 12802  df-exp 12861  df-cj 13839  df-re 13840  df-im 13841  df-sqrt 13975  df-abs 13976  df-clim 14219  df-rlim 14220  df-sum 14417  df-itg1 23389
This theorem is referenced by:  itg2i1fseq  23522  itg2i1fseq3  23524  itg2addlem  23525
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