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Mirrors > Home > MPE Home > Th. List > itg2lea | Structured version Visualization version GIF version |
Description: Approximate version of itg2le 24893. If 𝐹 ≤ 𝐺 for almost all 𝑥, then ∫2𝐹 ≤ ∫2𝐺. (Contributed by Mario Carneiro, 11-Aug-2014.) |
Ref | Expression |
---|---|
itg2lea.1 | ⊢ (𝜑 → 𝐹:ℝ⟶(0[,]+∞)) |
itg2lea.2 | ⊢ (𝜑 → 𝐺:ℝ⟶(0[,]+∞)) |
itg2lea.3 | ⊢ (𝜑 → 𝐴 ⊆ ℝ) |
itg2lea.4 | ⊢ (𝜑 → (vol*‘𝐴) = 0) |
itg2lea.5 | ⊢ ((𝜑 ∧ 𝑥 ∈ (ℝ ∖ 𝐴)) → (𝐹‘𝑥) ≤ (𝐺‘𝑥)) |
Ref | Expression |
---|---|
itg2lea | ⊢ (𝜑 → (∫2‘𝐹) ≤ (∫2‘𝐺)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | itg2lea.2 | . . . . . 6 ⊢ (𝜑 → 𝐺:ℝ⟶(0[,]+∞)) | |
2 | 1 | adantr 481 | . . . . 5 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) → 𝐺:ℝ⟶(0[,]+∞)) |
3 | simprl 768 | . . . . 5 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) → 𝑓 ∈ dom ∫1) | |
4 | itg2lea.3 | . . . . . 6 ⊢ (𝜑 → 𝐴 ⊆ ℝ) | |
5 | 4 | adantr 481 | . . . . 5 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) → 𝐴 ⊆ ℝ) |
6 | itg2lea.4 | . . . . . 6 ⊢ (𝜑 → (vol*‘𝐴) = 0) | |
7 | 6 | adantr 481 | . . . . 5 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) → (vol*‘𝐴) = 0) |
8 | i1ff 24829 | . . . . . . . . 9 ⊢ (𝑓 ∈ dom ∫1 → 𝑓:ℝ⟶ℝ) | |
9 | 8 | ad2antrl 725 | . . . . . . . 8 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) → 𝑓:ℝ⟶ℝ) |
10 | eldifi 4062 | . . . . . . . 8 ⊢ (𝑥 ∈ (ℝ ∖ 𝐴) → 𝑥 ∈ ℝ) | |
11 | ffvelrn 6953 | . . . . . . . 8 ⊢ ((𝑓:ℝ⟶ℝ ∧ 𝑥 ∈ ℝ) → (𝑓‘𝑥) ∈ ℝ) | |
12 | 9, 10, 11 | syl2an 596 | . . . . . . 7 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) ∧ 𝑥 ∈ (ℝ ∖ 𝐴)) → (𝑓‘𝑥) ∈ ℝ) |
13 | 12 | rexrd 11014 | . . . . . 6 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) ∧ 𝑥 ∈ (ℝ ∖ 𝐴)) → (𝑓‘𝑥) ∈ ℝ*) |
14 | iccssxr 13151 | . . . . . . 7 ⊢ (0[,]+∞) ⊆ ℝ* | |
15 | itg2lea.1 | . . . . . . . . 9 ⊢ (𝜑 → 𝐹:ℝ⟶(0[,]+∞)) | |
16 | 15 | adantr 481 | . . . . . . . 8 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) → 𝐹:ℝ⟶(0[,]+∞)) |
17 | ffvelrn 6953 | . . . . . . . 8 ⊢ ((𝐹:ℝ⟶(0[,]+∞) ∧ 𝑥 ∈ ℝ) → (𝐹‘𝑥) ∈ (0[,]+∞)) | |
18 | 16, 10, 17 | syl2an 596 | . . . . . . 7 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) ∧ 𝑥 ∈ (ℝ ∖ 𝐴)) → (𝐹‘𝑥) ∈ (0[,]+∞)) |
19 | 14, 18 | sselid 3920 | . . . . . 6 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) ∧ 𝑥 ∈ (ℝ ∖ 𝐴)) → (𝐹‘𝑥) ∈ ℝ*) |
20 | ffvelrn 6953 | . . . . . . . 8 ⊢ ((𝐺:ℝ⟶(0[,]+∞) ∧ 𝑥 ∈ ℝ) → (𝐺‘𝑥) ∈ (0[,]+∞)) | |
21 | 2, 10, 20 | syl2an 596 | . . . . . . 7 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) ∧ 𝑥 ∈ (ℝ ∖ 𝐴)) → (𝐺‘𝑥) ∈ (0[,]+∞)) |
22 | 14, 21 | sselid 3920 | . . . . . 6 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) ∧ 𝑥 ∈ (ℝ ∖ 𝐴)) → (𝐺‘𝑥) ∈ ℝ*) |
23 | simprr 770 | . . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) → 𝑓 ∘r ≤ 𝐹) | |
24 | 9 | ffnd 6595 | . . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) → 𝑓 Fn ℝ) |
25 | 16 | ffnd 6595 | . . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) → 𝐹 Fn ℝ) |
26 | reex 10951 | . . . . . . . . . . 11 ⊢ ℝ ∈ V | |
27 | 26 | a1i 11 | . . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) → ℝ ∈ V) |
28 | inidm 4154 | . . . . . . . . . 10 ⊢ (ℝ ∩ ℝ) = ℝ | |
29 | eqidd 2739 | . . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) ∧ 𝑥 ∈ ℝ) → (𝑓‘𝑥) = (𝑓‘𝑥)) | |
30 | eqidd 2739 | . . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) ∧ 𝑥 ∈ ℝ) → (𝐹‘𝑥) = (𝐹‘𝑥)) | |
31 | 24, 25, 27, 27, 28, 29, 30 | ofrfval 7535 | . . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) → (𝑓 ∘r ≤ 𝐹 ↔ ∀𝑥 ∈ ℝ (𝑓‘𝑥) ≤ (𝐹‘𝑥))) |
32 | 23, 31 | mpbid 231 | . . . . . . . 8 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) → ∀𝑥 ∈ ℝ (𝑓‘𝑥) ≤ (𝐹‘𝑥)) |
33 | 32 | r19.21bi 3134 | . . . . . . 7 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) ∧ 𝑥 ∈ ℝ) → (𝑓‘𝑥) ≤ (𝐹‘𝑥)) |
34 | 10, 33 | sylan2 593 | . . . . . 6 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) ∧ 𝑥 ∈ (ℝ ∖ 𝐴)) → (𝑓‘𝑥) ≤ (𝐹‘𝑥)) |
35 | itg2lea.5 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (ℝ ∖ 𝐴)) → (𝐹‘𝑥) ≤ (𝐺‘𝑥)) | |
36 | 35 | adantlr 712 | . . . . . 6 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) ∧ 𝑥 ∈ (ℝ ∖ 𝐴)) → (𝐹‘𝑥) ≤ (𝐺‘𝑥)) |
37 | 13, 19, 22, 34, 36 | xrletrd 12885 | . . . . 5 ⊢ (((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) ∧ 𝑥 ∈ (ℝ ∖ 𝐴)) → (𝑓‘𝑥) ≤ (𝐺‘𝑥)) |
38 | 2, 3, 5, 7, 37 | itg2uba 24897 | . . . 4 ⊢ ((𝜑 ∧ (𝑓 ∈ dom ∫1 ∧ 𝑓 ∘r ≤ 𝐹)) → (∫1‘𝑓) ≤ (∫2‘𝐺)) |
39 | 38 | expr 457 | . . 3 ⊢ ((𝜑 ∧ 𝑓 ∈ dom ∫1) → (𝑓 ∘r ≤ 𝐹 → (∫1‘𝑓) ≤ (∫2‘𝐺))) |
40 | 39 | ralrimiva 3103 | . 2 ⊢ (𝜑 → ∀𝑓 ∈ dom ∫1(𝑓 ∘r ≤ 𝐹 → (∫1‘𝑓) ≤ (∫2‘𝐺))) |
41 | itg2cl 24886 | . . . 4 ⊢ (𝐺:ℝ⟶(0[,]+∞) → (∫2‘𝐺) ∈ ℝ*) | |
42 | 1, 41 | syl 17 | . . 3 ⊢ (𝜑 → (∫2‘𝐺) ∈ ℝ*) |
43 | itg2leub 24888 | . . 3 ⊢ ((𝐹:ℝ⟶(0[,]+∞) ∧ (∫2‘𝐺) ∈ ℝ*) → ((∫2‘𝐹) ≤ (∫2‘𝐺) ↔ ∀𝑓 ∈ dom ∫1(𝑓 ∘r ≤ 𝐹 → (∫1‘𝑓) ≤ (∫2‘𝐺)))) | |
44 | 15, 42, 43 | syl2anc 584 | . 2 ⊢ (𝜑 → ((∫2‘𝐹) ≤ (∫2‘𝐺) ↔ ∀𝑓 ∈ dom ∫1(𝑓 ∘r ≤ 𝐹 → (∫1‘𝑓) ≤ (∫2‘𝐺)))) |
45 | 40, 44 | mpbird 256 | 1 ⊢ (𝜑 → (∫2‘𝐹) ≤ (∫2‘𝐺)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 = wceq 1539 ∈ wcel 2106 ∀wral 3064 Vcvv 3431 ∖ cdif 3885 ⊆ wss 3888 class class class wbr 5075 dom cdm 5586 ⟶wf 6424 ‘cfv 6428 (class class class)co 7269 ∘r cofr 7524 ℝcr 10859 0cc0 10860 +∞cpnf 10995 ℝ*cxr 10997 ≤ cle 10999 [,]cicc 13071 vol*covol 24615 ∫1citg1 24768 ∫2citg2 24769 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5210 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7580 ax-inf2 9388 ax-cnex 10916 ax-resscn 10917 ax-1cn 10918 ax-icn 10919 ax-addcl 10920 ax-addrcl 10921 ax-mulcl 10922 ax-mulrcl 10923 ax-mulcom 10924 ax-addass 10925 ax-mulass 10926 ax-distr 10927 ax-i2m1 10928 ax-1ne0 10929 ax-1rid 10930 ax-rnegex 10931 ax-rrecex 10932 ax-cnre 10933 ax-pre-lttri 10934 ax-pre-lttrn 10935 ax-pre-ltadd 10936 ax-pre-mulgt0 10937 ax-pre-sup 10938 ax-addf 10939 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3433 df-sbc 3718 df-csb 3834 df-dif 3891 df-un 3893 df-in 3895 df-ss 3905 df-pss 3907 df-nul 4259 df-if 4462 df-pw 4537 df-sn 4564 df-pr 4566 df-op 4570 df-uni 4842 df-int 4882 df-iun 4928 df-disj 5041 df-br 5076 df-opab 5138 df-mpt 5159 df-tr 5193 df-id 5486 df-eprel 5492 df-po 5500 df-so 5501 df-fr 5541 df-se 5542 df-we 5543 df-xp 5592 df-rel 5593 df-cnv 5594 df-co 5595 df-dm 5596 df-rn 5597 df-res 5598 df-ima 5599 df-pred 6197 df-ord 6264 df-on 6265 df-lim 6266 df-suc 6267 df-iota 6386 df-fun 6430 df-fn 6431 df-f 6432 df-f1 6433 df-fo 6434 df-f1o 6435 df-fv 6436 df-isom 6437 df-riota 7226 df-ov 7272 df-oprab 7273 df-mpo 7274 df-of 7525 df-ofr 7526 df-om 7705 df-1st 7822 df-2nd 7823 df-frecs 8086 df-wrecs 8117 df-recs 8191 df-rdg 8230 df-1o 8286 df-2o 8287 df-er 8487 df-map 8606 df-pm 8607 df-en 8723 df-dom 8724 df-sdom 8725 df-fin 8726 df-fi 9159 df-sup 9190 df-inf 9191 df-oi 9258 df-dju 9648 df-card 9686 df-pnf 11000 df-mnf 11001 df-xr 11002 df-ltxr 11003 df-le 11004 df-sub 11196 df-neg 11197 df-div 11622 df-nn 11963 df-2 12025 df-3 12026 df-n0 12223 df-z 12309 df-uz 12572 df-q 12678 df-rp 12720 df-xneg 12837 df-xadd 12838 df-xmul 12839 df-ioo 13072 df-ico 13074 df-icc 13075 df-fz 13229 df-fzo 13372 df-fl 13501 df-seq 13711 df-exp 13772 df-hash 14034 df-cj 14799 df-re 14800 df-im 14801 df-sqrt 14935 df-abs 14936 df-clim 15186 df-sum 15387 df-rest 17122 df-topgen 17143 df-psmet 20578 df-xmet 20579 df-met 20580 df-bl 20581 df-mopn 20582 df-top 22032 df-topon 22049 df-bases 22085 df-cmp 22527 df-ovol 24617 df-vol 24618 df-mbf 24772 df-itg1 24773 df-itg2 24774 |
This theorem is referenced by: itg2eqa 24899 |
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