Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > smfpimltxrmpt | 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 below is in the subspace sigma-algebra induced by its domain. (Contributed by Glauco Siliprandi, 26-Jun-2021.) |
Ref | Expression |
---|---|
smfpimltxrmpt.x | ⊢ Ⅎ𝑥𝜑 |
smfpimltxrmpt.s | ⊢ (𝜑 → 𝑆 ∈ SAlg) |
smfpimltxrmpt.b | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ 𝑉) |
smfpimltxrmpt.f | ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵) ∈ (SMblFn‘𝑆)) |
smfpimltxrmpt.r | ⊢ (𝜑 → 𝑅 ∈ ℝ*) |
Ref | Expression |
---|---|
smfpimltxrmpt | ⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝐵 < 𝑅} ∈ (𝑆 ↾t 𝐴)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfmpt1 4675 | . . . . . 6 ⊢ Ⅎ𝑥(𝑥 ∈ 𝐴 ↦ 𝐵) | |
2 | 1 | nfdm 5288 | . . . . 5 ⊢ Ⅎ𝑥dom (𝑥 ∈ 𝐴 ↦ 𝐵) |
3 | nfcv 2751 | . . . . 5 ⊢ Ⅎ𝑦dom (𝑥 ∈ 𝐴 ↦ 𝐵) | |
4 | nfv 1830 | . . . . 5 ⊢ Ⅎ𝑦((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) < 𝑅 | |
5 | nfcv 2751 | . . . . . . 7 ⊢ Ⅎ𝑥𝑦 | |
6 | 1, 5 | nffv 6110 | . . . . . 6 ⊢ Ⅎ𝑥((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑦) |
7 | nfcv 2751 | . . . . . 6 ⊢ Ⅎ𝑥 < | |
8 | nfcv 2751 | . . . . . 6 ⊢ Ⅎ𝑥𝑅 | |
9 | 6, 7, 8 | nfbr 4629 | . . . . 5 ⊢ Ⅎ𝑥((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑦) < 𝑅 |
10 | fveq2 6103 | . . . . . 6 ⊢ (𝑥 = 𝑦 → ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) = ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑦)) | |
11 | 10 | breq1d 4593 | . . . . 5 ⊢ (𝑥 = 𝑦 → (((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) < 𝑅 ↔ ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑦) < 𝑅)) |
12 | 2, 3, 4, 9, 11 | cbvrab 3171 | . . . 4 ⊢ {𝑥 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) < 𝑅} = {𝑦 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑦) < 𝑅} |
13 | 12 | a1i 11 | . . 3 ⊢ (𝜑 → {𝑥 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) < 𝑅} = {𝑦 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑦) < 𝑅}) |
14 | nfcv 2751 | . . . 4 ⊢ Ⅎ𝑦(𝑥 ∈ 𝐴 ↦ 𝐵) | |
15 | smfpimltxrmpt.s | . . . 4 ⊢ (𝜑 → 𝑆 ∈ SAlg) | |
16 | smfpimltxrmpt.f | . . . 4 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵) ∈ (SMblFn‘𝑆)) | |
17 | eqid 2610 | . . . 4 ⊢ dom (𝑥 ∈ 𝐴 ↦ 𝐵) = dom (𝑥 ∈ 𝐴 ↦ 𝐵) | |
18 | smfpimltxrmpt.r | . . . 4 ⊢ (𝜑 → 𝑅 ∈ ℝ*) | |
19 | 14, 15, 16, 17, 18 | smfpimltxr 39634 | . . 3 ⊢ (𝜑 → {𝑦 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑦) < 𝑅} ∈ (𝑆 ↾t dom (𝑥 ∈ 𝐴 ↦ 𝐵))) |
20 | 13, 19 | eqeltrd 2688 | . 2 ⊢ (𝜑 → {𝑥 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) < 𝑅} ∈ (𝑆 ↾t dom (𝑥 ∈ 𝐴 ↦ 𝐵))) |
21 | smfpimltxrmpt.x | . . . . . 6 ⊢ Ⅎ𝑥𝜑 | |
22 | eqid 2610 | . . . . . 6 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐵) | |
23 | smfpimltxrmpt.b | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ 𝑉) | |
24 | 21, 22, 23 | dmmptdf 38412 | . . . . 5 ⊢ (𝜑 → dom (𝑥 ∈ 𝐴 ↦ 𝐵) = 𝐴) |
25 | nfcv 2751 | . . . . . 6 ⊢ Ⅎ𝑥𝐴 | |
26 | 2, 25 | rabeqf 3165 | . . . . 5 ⊢ (dom (𝑥 ∈ 𝐴 ↦ 𝐵) = 𝐴 → {𝑥 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) < 𝑅} = {𝑥 ∈ 𝐴 ∣ ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) < 𝑅}) |
27 | 24, 26 | syl 17 | . . . 4 ⊢ (𝜑 → {𝑥 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) < 𝑅} = {𝑥 ∈ 𝐴 ∣ ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) < 𝑅}) |
28 | 22 | a1i 11 | . . . . . . 7 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐵)) |
29 | 28, 23 | fvmpt2d 6202 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) = 𝐵) |
30 | 29 | breq1d 4593 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) < 𝑅 ↔ 𝐵 < 𝑅)) |
31 | 21, 30 | rabbida 38302 | . . . 4 ⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) < 𝑅} = {𝑥 ∈ 𝐴 ∣ 𝐵 < 𝑅}) |
32 | eqidd 2611 | . . . 4 ⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝐵 < 𝑅} = {𝑥 ∈ 𝐴 ∣ 𝐵 < 𝑅}) | |
33 | 27, 31, 32 | 3eqtrrd 2649 | . . 3 ⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝐵 < 𝑅} = {𝑥 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) < 𝑅}) |
34 | 24 | eqcomd 2616 | . . . 4 ⊢ (𝜑 → 𝐴 = dom (𝑥 ∈ 𝐴 ↦ 𝐵)) |
35 | 34 | oveq2d 6565 | . . 3 ⊢ (𝜑 → (𝑆 ↾t 𝐴) = (𝑆 ↾t dom (𝑥 ∈ 𝐴 ↦ 𝐵))) |
36 | 33, 35 | eleq12d 2682 | . 2 ⊢ (𝜑 → ({𝑥 ∈ 𝐴 ∣ 𝐵 < 𝑅} ∈ (𝑆 ↾t 𝐴) ↔ {𝑥 ∈ dom (𝑥 ∈ 𝐴 ↦ 𝐵) ∣ ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑥) < 𝑅} ∈ (𝑆 ↾t dom (𝑥 ∈ 𝐴 ↦ 𝐵)))) |
37 | 20, 36 | mpbird 246 | 1 ⊢ (𝜑 → {𝑥 ∈ 𝐴 ∣ 𝐵 < 𝑅} ∈ (𝑆 ↾t 𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 = wceq 1475 Ⅎwnf 1699 ∈ wcel 1977 {crab 2900 class class class wbr 4583 ↦ cmpt 4643 dom cdm 5038 ‘cfv 5804 (class class class)co 6549 ℝ*cxr 9952 < clt 9953 ↾t crest 15904 SAlgcsalg 39204 SMblFncsmblfn 39586 |
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-inf2 8421 ax-cc 9140 ax-ac2 9168 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 |
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-int 4411 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-se 4998 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-isom 5813 df-riota 6511 df-ov 6552 df-oprab 6553 df-mpt2 6554 df-om 6958 df-1st 7059 df-2nd 7060 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-1o 7447 df-oadd 7451 df-er 7629 df-map 7746 df-pm 7747 df-en 7842 df-dom 7843 df-sdom 7844 df-fin 7845 df-card 8648 df-acn 8651 df-ac 8822 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 df-sub 10147 df-neg 10148 df-nn 10898 df-n0 11170 df-z 11255 df-uz 11564 df-ioo 12050 df-ico 12052 df-rest 15906 df-salg 39205 df-smblfn 39587 |
This theorem is referenced by: smfpimioompt 39671 |
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