Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > smfpimgtxrmpt | 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 |
---|---|
smfpimgtxrmpt.x | ⊢ Ⅎ𝑥𝜑 |
smfpimgtxrmpt.s | ⊢ (𝜑 → 𝑆 ∈ SAlg) |
smfpimgtxrmpt.b | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ 𝑉) |
smfpimgtxrmpt.f | ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵) ∈ (SMblFn‘𝑆)) |
smfpimgtxrmpt.l | ⊢ (𝜑 → 𝐿 ∈ ℝ*) |
Ref | Expression |
---|---|
smfpimgtxrmpt | ⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝐿 < 𝐵} ∈ (𝑆 ↾t 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfmpt1 5128 | . . . . . 6 ⊢ Ⅎ𝑥(𝑥 ∈ 𝐴 ↦ 𝐵) | |
2 | 1 | nfdm 5794 | . . . . 5 ⊢ Ⅎ𝑥dom (𝑥 ∈ 𝐴 ↦ 𝐵) |
3 | nfcv 2899 | . . . . 5 ⊢ Ⅎ𝑦dom (𝑥 ∈ 𝐴 ↦ 𝐵) | |
4 | nfv 1921 | . . . . 5 ⊢ Ⅎ𝑦 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) | |
5 | nfcv 2899 | . . . . . 6 ⊢ Ⅎ𝑥𝐿 | |
6 | nfcv 2899 | . . . . . 6 ⊢ Ⅎ𝑥 < | |
7 | nfcv 2899 | . . . . . . 7 ⊢ Ⅎ𝑥𝑦 | |
8 | 1, 7 | nffv 6684 | . . . . . 6 ⊢ Ⅎ𝑥((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑦) |
9 | 5, 6, 8 | nfbr 5077 | . . . . 5 ⊢ Ⅎ𝑥 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑦) |
10 | fveq2 6674 | . . . . . 6 ⊢ (𝑥 = 𝑦 → ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) = ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑦)) | |
11 | 10 | breq2d 5042 | . . . . 5 ⊢ (𝑥 = 𝑦 → (𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) ↔ 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑦))) |
12 | 2, 3, 4, 9, 11 | cbvrabw 3391 | . . . 4 ⊢ {𝑥 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥)} = {𝑦 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑦)} |
13 | 12 | a1i 11 | . . 3 ⊢ (𝜑 → {𝑥 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥)} = {𝑦 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑦)}) |
14 | nfcv 2899 | . . . 4 ⊢ Ⅎ𝑦(𝑥 ∈ 𝐴 ↦ 𝐵) | |
15 | smfpimgtxrmpt.s | . . . 4 ⊢ (𝜑 → 𝑆 ∈ SAlg) | |
16 | smfpimgtxrmpt.f | . . . 4 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵) ∈ (SMblFn‘𝑆)) | |
17 | eqid 2738 | . . . 4 ⊢ dom (𝑥 ∈ 𝐴 ↦ 𝐵) = dom (𝑥 ∈ 𝐴 ↦ 𝐵) | |
18 | smfpimgtxrmpt.l | . . . 4 ⊢ (𝜑 → 𝐿 ∈ ℝ*) | |
19 | 14, 15, 16, 17, 18 | smfpimgtxr 43854 | . . 3 ⊢ (𝜑 → {𝑦 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑦)} ∈ (𝑆 ↾t dom (𝑥 ∈ 𝐴 ↦ 𝐵))) |
20 | 13, 19 | eqeltrd 2833 | . 2 ⊢ (𝜑 → {𝑥 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥)} ∈ (𝑆 ↾t dom (𝑥 ∈ 𝐴 ↦ 𝐵))) |
21 | smfpimgtxrmpt.x | . . . . . 6 ⊢ Ⅎ𝑥𝜑 | |
22 | eqid 2738 | . . . . . 6 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐵) | |
23 | smfpimgtxrmpt.b | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ 𝑉) | |
24 | 21, 22, 23 | dmmptdf 42301 | . . . . 5 ⊢ (𝜑 → dom (𝑥 ∈ 𝐴 ↦ 𝐵) = 𝐴) |
25 | nfcv 2899 | . . . . . 6 ⊢ Ⅎ𝑥𝐴 | |
26 | 2, 25 | rabeqf 3382 | . . . . 5 ⊢ (dom (𝑥 ∈ 𝐴 ↦ 𝐵) = 𝐴 → {𝑥 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥)} = {𝑥 ∈ 𝐴 ∣ 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥)}) |
27 | 24, 26 | syl 17 | . . . 4 ⊢ (𝜑 → {𝑥 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥)} = {𝑥 ∈ 𝐴 ∣ 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥)}) |
28 | 22 | a1i 11 | . . . . . . 7 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐵)) |
29 | 28, 23 | fvmpt2d 6788 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) = 𝐵) |
30 | 29 | breq2d 5042 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) ↔ 𝐿 < 𝐵)) |
31 | 21, 30 | rabbida 3375 | . . . 4 ⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥)} = {𝑥 ∈ 𝐴 ∣ 𝐿 < 𝐵}) |
32 | eqidd 2739 | . . . 4 ⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝐿 < 𝐵} = {𝑥 ∈ 𝐴 ∣ 𝐿 < 𝐵}) | |
33 | 27, 31, 32 | 3eqtrrd 2778 | . . 3 ⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝐿 < 𝐵} = {𝑥 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ 𝐿 < ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥)}) |
34 | 24 | eqcomd 2744 | . . . 4 ⊢ (𝜑 → 𝐴 = dom (𝑥 ∈ 𝐴 ↦ 𝐵)) |
35 | 34 | oveq2d 7186 | . . 3 ⊢ (𝜑 → (𝑆 ↾t 𝐴) = (𝑆 ↾t dom (𝑥 ∈ 𝐴 ↦ 𝐵))) |
36 | 33, 35 | eleq12d 2827 | . 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)))) |
37 | 20, 36 | mpbird 260 | 1 ⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝐿 < 𝐵} ∈ (𝑆 ↾t 𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 = wceq 1542 Ⅎwnf 1790 ∈ wcel 2114 {crab 3057 class class class wbr 5030 ↦ cmpt 5110 dom cdm 5525 ‘cfv 6339 (class class class)co 7170 ℝ*cxr 10752 < clt 10753 ↾t crest 16797 SAlgcsalg 43391 SMblFncsmblfn 43775 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1975 ax-7 2020 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2162 ax-12 2179 ax-ext 2710 ax-rep 5154 ax-sep 5167 ax-nul 5174 ax-pow 5232 ax-pr 5296 ax-un 7479 ax-inf2 9177 ax-cc 9935 ax-ac2 9963 ax-cnex 10671 ax-resscn 10672 ax-1cn 10673 ax-icn 10674 ax-addcl 10675 ax-addrcl 10676 ax-mulcl 10677 ax-mulrcl 10678 ax-mulcom 10679 ax-addass 10680 ax-mulass 10681 ax-distr 10682 ax-i2m1 10683 ax-1ne0 10684 ax-1rid 10685 ax-rnegex 10686 ax-rrecex 10687 ax-cnre 10688 ax-pre-lttri 10689 ax-pre-lttrn 10690 ax-pre-ltadd 10691 ax-pre-mulgt0 10692 ax-pre-sup 10693 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1787 df-nf 1791 df-sb 2075 df-mo 2540 df-eu 2570 df-clab 2717 df-cleq 2730 df-clel 2811 df-nfc 2881 df-ne 2935 df-nel 3039 df-ral 3058 df-rex 3059 df-reu 3060 df-rmo 3061 df-rab 3062 df-v 3400 df-sbc 3681 df-csb 3791 df-dif 3846 df-un 3848 df-in 3850 df-ss 3860 df-pss 3862 df-nul 4212 df-if 4415 df-pw 4490 df-sn 4517 df-pr 4519 df-tp 4521 df-op 4523 df-uni 4797 df-int 4837 df-iun 4883 df-iin 4884 df-br 5031 df-opab 5093 df-mpt 5111 df-tr 5137 df-id 5429 df-eprel 5434 df-po 5442 df-so 5443 df-fr 5483 df-se 5484 df-we 5485 df-xp 5531 df-rel 5532 df-cnv 5533 df-co 5534 df-dm 5535 df-rn 5536 df-res 5537 df-ima 5538 df-pred 6129 df-ord 6175 df-on 6176 df-lim 6177 df-suc 6178 df-iota 6297 df-fun 6341 df-fn 6342 df-f 6343 df-f1 6344 df-fo 6345 df-f1o 6346 df-fv 6347 df-isom 6348 df-riota 7127 df-ov 7173 df-oprab 7174 df-mpo 7175 df-om 7600 df-1st 7714 df-2nd 7715 df-wrecs 7976 df-recs 8037 df-rdg 8075 df-1o 8131 df-er 8320 df-map 8439 df-pm 8440 df-en 8556 df-dom 8557 df-sdom 8558 df-fin 8559 df-sup 8979 df-inf 8980 df-card 9441 df-acn 9444 df-ac 9616 df-pnf 10755 df-mnf 10756 df-xr 10757 df-ltxr 10758 df-le 10759 df-sub 10950 df-neg 10951 df-div 11376 df-nn 11717 df-n0 11977 df-z 12063 df-uz 12325 df-q 12431 df-rp 12473 df-ioo 12825 df-ico 12827 df-fl 13253 df-rest 16799 df-salg 43392 df-smblfn 43776 |
This theorem is referenced by: smfpimioompt 43859 |
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