Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > smfpimgtmpt | Structured version Visualization version GIF version |
Description: Given a function measurable w.r.t. to a sigma-algebra, the preimage of an open interval unbounded above is in the subspace sigma-algebra induced by its domain. (Contributed by Glauco Siliprandi, 26-Jun-2021.) |
Ref | Expression |
---|---|
smfpimgtmpt.x | ⊢ Ⅎ𝑥𝜑 |
smfpimgtmpt.s | ⊢ (𝜑 → 𝑆 ∈ SAlg) |
smfpimgtmpt.b | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ 𝑉) |
smfpimgtmpt.f | ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵) ∈ (SMblFn‘𝑆)) |
smfpimgtmpt.l | ⊢ (𝜑 → 𝐿 ∈ ℝ) |
Ref | Expression |
---|---|
smfpimgtmpt | ⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝐿 < 𝐵} ∈ (𝑆 ↾t 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfmpt1 5178 | . . 3 ⊢ Ⅎ𝑥(𝑥 ∈ 𝐴 ↦ 𝐵) | |
2 | smfpimgtmpt.s | . . 3 ⊢ (𝜑 → 𝑆 ∈ SAlg) | |
3 | smfpimgtmpt.f | . . 3 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵) ∈ (SMblFn‘𝑆)) | |
4 | eqid 2738 | . . 3 ⊢ dom (𝑥 ∈ 𝐴 ↦ 𝐵) = dom (𝑥 ∈ 𝐴 ↦ 𝐵) | |
5 | smfpimgtmpt.l | . . 3 ⊢ (𝜑 → 𝐿 ∈ ℝ) | |
6 | 1, 2, 3, 4, 5 | smfpreimagtf 44190 | . 2 ⊢ (𝜑 → {𝑥 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥)} ∈ (𝑆 ↾t dom (𝑥 ∈ 𝐴 ↦ 𝐵))) |
7 | smfpimgtmpt.x | . . . . . 6 ⊢ Ⅎ𝑥𝜑 | |
8 | eqid 2738 | . . . . . 6 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐵) | |
9 | smfpimgtmpt.b | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ 𝑉) | |
10 | 7, 8, 9 | dmmptdf 42652 | . . . . 5 ⊢ (𝜑 → dom (𝑥 ∈ 𝐴 ↦ 𝐵) = 𝐴) |
11 | 1 | nfdm 5849 | . . . . . 6 ⊢ Ⅎ𝑥dom (𝑥 ∈ 𝐴 ↦ 𝐵) |
12 | nfcv 2906 | . . . . . 6 ⊢ Ⅎ𝑥𝐴 | |
13 | 11, 12 | rabeqf 3405 | . . . . 5 ⊢ (dom (𝑥 ∈ 𝐴 ↦ 𝐵) = 𝐴 → {𝑥 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥)} = {𝑥 ∈ 𝐴 ∣ 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥)}) |
14 | 10, 13 | syl 17 | . . . 4 ⊢ (𝜑 → {𝑥 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥)} = {𝑥 ∈ 𝐴 ∣ 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥)}) |
15 | 8 | a1i 11 | . . . . . . 7 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐵)) |
16 | 15, 9 | fvmpt2d 6870 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) = 𝐵) |
17 | 16 | breq2d 5082 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) ↔ 𝐿 < 𝐵)) |
18 | 7, 17 | rabbida 3398 | . . . 4 ⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥)} = {𝑥 ∈ 𝐴 ∣ 𝐿 < 𝐵}) |
19 | eqidd 2739 | . . . 4 ⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝐿 < 𝐵} = {𝑥 ∈ 𝐴 ∣ 𝐿 < 𝐵}) | |
20 | 14, 18, 19 | 3eqtrrd 2783 | . . 3 ⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝐿 < 𝐵} = {𝑥 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥)}) |
21 | 10 | eqcomd 2744 | . . . 4 ⊢ (𝜑 → 𝐴 = dom (𝑥 ∈ 𝐴 ↦ 𝐵)) |
22 | 21 | oveq2d 7271 | . . 3 ⊢ (𝜑 → (𝑆 ↾t 𝐴) = (𝑆 ↾t dom (𝑥 ∈ 𝐴 ↦ 𝐵))) |
23 | 20, 22 | eleq12d 2833 | . 2 ⊢ (𝜑 → ({𝑥 ∈ 𝐴 ∣ 𝐿 < 𝐵} ∈ (𝑆 ↾t 𝐴) ↔ {𝑥 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥)} ∈ (𝑆 ↾t dom (𝑥 ∈ 𝐴 ↦ 𝐵)))) |
24 | 6, 23 | mpbird 256 | 1 ⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝐿 < 𝐵} ∈ (𝑆 ↾t 𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 = wceq 1539 Ⅎwnf 1787 ∈ wcel 2108 {crab 3067 class class class wbr 5070 ↦ cmpt 5153 dom cdm 5580 ‘cfv 6418 (class class class)co 7255 ℝcr 10801 < clt 10940 ↾t crest 17048 SAlgcsalg 43739 SMblFncsmblfn 44123 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-inf2 9329 ax-cc 10122 ax-ac2 10150 ax-cnex 10858 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 ax-pre-mulgt0 10879 ax-pre-sup 10880 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rmo 3071 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3902 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-tp 4563 df-op 4565 df-uni 4837 df-int 4877 df-iun 4923 df-iin 4924 df-br 5071 df-opab 5133 df-mpt 5154 df-tr 5188 df-id 5480 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-se 5536 df-we 5537 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-pred 6191 df-ord 6254 df-on 6255 df-lim 6256 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-isom 6427 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-om 7688 df-1st 7804 df-2nd 7805 df-frecs 8068 df-wrecs 8099 df-recs 8173 df-rdg 8212 df-1o 8267 df-er 8456 df-map 8575 df-pm 8576 df-en 8692 df-dom 8693 df-sdom 8694 df-fin 8695 df-sup 9131 df-inf 9132 df-card 9628 df-acn 9631 df-ac 9803 df-pnf 10942 df-mnf 10943 df-xr 10944 df-ltxr 10945 df-le 10946 df-sub 11137 df-neg 11138 df-div 11563 df-nn 11904 df-n0 12164 df-z 12250 df-uz 12512 df-q 12618 df-rp 12660 df-ioo 13012 df-ico 13014 df-fl 13440 df-rest 17050 df-salg 43740 df-smblfn 44124 |
This theorem is referenced by: smfrec 44210 |
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