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| Mirrors > Home > MPE Home > Th. List > Mathboxes > smfdmss | Structured version Visualization version GIF version | ||
| Description: The domain of a function measurable w.r.t. to a sigma-algebra, is a subset of the set underlying the sigma-algebra. (Contributed by Glauco Siliprandi, 26-Jun-2021.) |
| Ref | Expression |
|---|---|
| smfdmss.s | ⊢ (𝜑 → 𝑆 ∈ SAlg) |
| smfdmss.f | ⊢ (𝜑 → 𝐹 ∈ (SMblFn‘𝑆)) |
| smfdmss.d | ⊢ 𝐷 = dom 𝐹 |
| Ref | Expression |
|---|---|
| smfdmss | ⊢ (𝜑 → 𝐷 ⊆ ∪ 𝑆) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | smfdmss.f | . . 3 ⊢ (𝜑 → 𝐹 ∈ (SMblFn‘𝑆)) | |
| 2 | smfdmss.s | . . . 4 ⊢ (𝜑 → 𝑆 ∈ SAlg) | |
| 3 | smfdmss.d | . . . 4 ⊢ 𝐷 = dom 𝐹 | |
| 4 | 2, 3 | issmf 47953 | . . 3 ⊢ (𝜑 → (𝐹 ∈ (SMblFn‘𝑆) ↔ (𝐷 ⊆ ∪ 𝑆 ∧ 𝐹:𝐷⟶ℝ ∧ ∀𝑎 ∈ ℝ {𝑥 ∈ 𝐷 ∣ (𝐹‘𝑥) < 𝑎} ∈ (𝑆 ↾t 𝐷)))) |
| 5 | 1, 4 | mpbid 235 | . 2 ⊢ (𝜑 → (𝐷 ⊆ ∪ 𝑆 ∧ 𝐹:𝐷⟶ℝ ∧ ∀𝑎 ∈ ℝ {𝑥 ∈ 𝐷 ∣ (𝐹‘𝑥) < 𝑎} ∈ (𝑆 ↾t 𝐷))) |
| 6 | 5 | simp1d 1160 | 1 ⊢ (𝜑 → 𝐷 ⊆ ∪ 𝑆) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ w3a 1103 = wceq 1570 ∈ wcel 2147 ∀wral 3080 {crab 3416 ⊆ wss 3900 ∪ cuni 4870 class class class wbr 5106 dom cdm 5656 ⟶wf 6557 ‘cfv 6561 (class class class)co 7446 ℝcr 11229 < clt 11373 ↾t crest 17623 SAlgcsalg 47533 SMblFncsmblfn 47920 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5253 ax-nul 5264 ax-pow 5332 ax-pr 5396 ax-un 7778 ax-cnex 11286 ax-resscn 11287 ax-pre-lttri 11304 ax-pre-lttrn 11305 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5172 df-mpt 5191 df-id 5551 df-po 5564 df-so 5565 df-xp 5662 df-rel 5663 df-cnv 5664 df-co 5665 df-dm 5666 df-rn 5667 df-res 5668 df-ima 5669 df-iota 6515 df-fun 6563 df-fn 6564 df-f 6565 df-f1 6566 df-fo 6567 df-f1o 6568 df-fv 6569 df-ov 7449 df-oprab 7450 df-mpo 7451 df-1st 8028 df-2nd 8029 df-er 8748 df-pm 8881 df-en 9005 df-dom 9006 df-sdom 9007 df-pnf 11375 df-mnf 11376 df-xr 11377 df-ltxr 11378 df-le 11379 df-ioo 13510 df-ico 13512 df-smblfn 47921 |
| This theorem is used by: sssmf 47963 smfsssmf 47968 issmfle 47970 smfpimltxr 47972 issmfgt 47981 smfadd 47990 issmfge 47995 smflim 48002 smfpimgtxr 48005 smfpimioo 48012 smfresal 48013 smfrec 48014 smfres 48015 smfmul 48020 smfmulc1 48021 smfco 48027 smfsuplem3 48038 smfpimne 48064 smfpimne2 48065 |
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