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| Mirrors > Home > MPE Home > Th. List > Mathboxes > issmfle2d | Structured version Visualization version GIF version | ||
| Description: A sufficient condition for "𝐹 being a measurable function w.r.t. to the sigma-algebra 𝑆". (Contributed by Glauco Siliprandi, 23-Oct-2021.) |
| Ref | Expression |
|---|---|
| issmfle2d.a | ⊢ Ⅎ𝑎𝜑 |
| issmfle2d.s | ⊢ (𝜑 → 𝑆 ∈ SAlg) |
| issmfle2d.d | ⊢ (𝜑 → 𝐷 ⊆ ∪ 𝑆) |
| issmfle2d.f | ⊢ (𝜑 → 𝐹:𝐷⟶ℝ) |
| issmfle2d.l | ⊢ ((𝜑 ∧ 𝑎 ∈ ℝ) → (◡𝐹 “ (-∞(,]𝑎)) ∈ (𝑆 ↾t 𝐷)) |
| Ref | Expression |
|---|---|
| issmfle2d | ⊢ (𝜑 → 𝐹 ∈ (SMblFn‘𝑆)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | issmfle2d.a | . 2 ⊢ Ⅎ𝑎𝜑 | |
| 2 | issmfle2d.s | . 2 ⊢ (𝜑 → 𝑆 ∈ SAlg) | |
| 3 | issmfle2d.d | . 2 ⊢ (𝜑 → 𝐷 ⊆ ∪ 𝑆) | |
| 4 | issmfle2d.f | . 2 ⊢ (𝜑 → 𝐹:𝐷⟶ℝ) | |
| 5 | 4 | adantr 486 | . . . 4 ⊢ ((𝜑 ∧ 𝑎 ∈ ℝ) → 𝐹:𝐷⟶ℝ) |
| 6 | rexr 11279 | . . . . 5 ⊢ (𝑎 ∈ ℝ → 𝑎 ∈ ℝ*) | |
| 7 | 6 | adantl 487 | . . . 4 ⊢ ((𝜑 ∧ 𝑎 ∈ ℝ) → 𝑎 ∈ ℝ*) |
| 8 | 5, 7 | preimaiocmnf 46390 | . . 3 ⊢ ((𝜑 ∧ 𝑎 ∈ ℝ) → (◡𝐹 “ (-∞(,]𝑎)) = {𝑥 ∈ 𝐷 ∣ (𝐹‘𝑥) ≤ 𝑎}) |
| 9 | issmfle2d.l | . . 3 ⊢ ((𝜑 ∧ 𝑎 ∈ ℝ) → (◡𝐹 “ (-∞(,]𝑎)) ∈ (𝑆 ↾t 𝐷)) | |
| 10 | 8, 9 | eqeltrrd 2861 | . 2 ⊢ ((𝜑 ∧ 𝑎 ∈ ℝ) → {𝑥 ∈ 𝐷 ∣ (𝐹‘𝑥) ≤ 𝑎} ∈ (𝑆 ↾t 𝐷)) |
| 11 | 1, 2, 3, 4, 10 | issmfled 47585 | 1 ⊢ (𝜑 → 𝐹 ∈ (SMblFn‘𝑆)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 Ⅎwnf 1816 ∈ wcel 2145 {crab 3412 ⊆ wss 3899 ∪ cuni 4867 class class class wbr 5103 ◡ccnv 5654 “ cima 5658 ⟶wf 6529 ‘cfv 6533 (class class class)co 7413 ℝcr 11123 -∞cmnf 11265 ℝ*cxr 11266 ≤ cle 11268 (,]cioc 13399 ↾t crest 17505 SAlgcsalg 47136 SMblFncsmblfn 47523 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-rep 5232 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7736 ax-inf2 9620 ax-cc 10437 ax-cnex 11180 ax-resscn 11181 ax-1cn 11182 ax-icn 11183 ax-addcl 11184 ax-addrcl 11185 ax-mulcl 11186 ax-mulrcl 11187 ax-mulcom 11188 ax-addass 11189 ax-mulass 11190 ax-distr 11191 ax-i2m1 11192 ax-1ne0 11193 ax-1rid 11194 ax-rnegex 11195 ax-rrecex 11196 ax-cnre 11197 ax-pre-lttri 11198 ax-pre-lttrn 11199 ax-pre-ltadd 11200 ax-pre-mulgt0 11201 ax-pre-sup 11202 |
| 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 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-iin 4954 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-se 5609 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-isom 6542 df-riota 7370 df-ov 7416 df-oprab 7417 df-mpo 7418 df-om 7863 df-1st 7986 df-2nd 7987 df-frecs 8280 df-wrecs 8311 df-recs 8360 df-rdg 8399 df-1o 8455 df-er 8696 df-map 8828 df-pm 8829 df-en 8953 df-dom 8954 df-sdom 8955 df-fin 8956 df-sup 9412 df-inf 9413 df-card 9944 df-acn 9947 df-pnf 11269 df-mnf 11270 df-xr 11271 df-ltxr 11272 df-le 11273 df-sub 11467 df-neg 11468 df-div 11896 df-nn 12258 df-n0 12529 df-z 12616 df-uz 12888 df-q 12998 df-rp 13043 df-ioo 13402 df-ioc 13403 df-ico 13404 df-fl 13853 df-rest 17507 df-salg 47137 df-smblfn 47524 |
| This theorem is used by: smfsuplem3 47641 |
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