![]() |
Mathbox for Glauco Siliprandi |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > MPE Home > Th. List > Mathboxes > issmfled | Structured version Visualization version GIF version |
Description: A sufficient condition for "𝐹 being a real-valued measurable function w.r.t. to the sigma-algebra 𝑆". (Contributed by Glauco Siliprandi, 26-Jun-2021.) |
Ref | Expression |
---|---|
issmfled.a | ⊢ Ⅎ𝑎𝜑 |
issmfled.s | ⊢ (𝜑 → 𝑆 ∈ SAlg) |
issmfled.d | ⊢ (𝜑 → 𝐷 ⊆ ∪ 𝑆) |
issmfled.f | ⊢ (𝜑 → 𝐹:𝐷⟶ℝ) |
issmfled.6 | ⊢ ((𝜑 ∧ 𝑎 ∈ ℝ) → {𝑥 ∈ 𝐷 ∣ (𝐹‘𝑥) ≤ 𝑎} ∈ (𝑆 ↾t 𝐷)) |
Ref | Expression |
---|---|
issmfled | ⊢ (𝜑 → 𝐹 ∈ (SMblFn‘𝑆)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | issmfled.f | . . . . 5 ⊢ (𝜑 → 𝐹:𝐷⟶ℝ) | |
2 | 1 | fdmd 6679 | . . . 4 ⊢ (𝜑 → dom 𝐹 = 𝐷) |
3 | issmfled.d | . . . 4 ⊢ (𝜑 → 𝐷 ⊆ ∪ 𝑆) | |
4 | 2, 3 | eqsstrd 3982 | . . 3 ⊢ (𝜑 → dom 𝐹 ⊆ ∪ 𝑆) |
5 | 1 | ffdmd 6699 | . . 3 ⊢ (𝜑 → 𝐹:dom 𝐹⟶ℝ) |
6 | issmfled.a | . . . 4 ⊢ Ⅎ𝑎𝜑 | |
7 | issmfled.6 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑎 ∈ ℝ) → {𝑥 ∈ 𝐷 ∣ (𝐹‘𝑥) ≤ 𝑎} ∈ (𝑆 ↾t 𝐷)) | |
8 | 2 | rabeqdv 3422 | . . . . . . . 8 ⊢ (𝜑 → {𝑥 ∈ dom 𝐹 ∣ (𝐹‘𝑥) ≤ 𝑎} = {𝑥 ∈ 𝐷 ∣ (𝐹‘𝑥) ≤ 𝑎}) |
9 | 2 | oveq2d 7372 | . . . . . . . 8 ⊢ (𝜑 → (𝑆 ↾t dom 𝐹) = (𝑆 ↾t 𝐷)) |
10 | 8, 9 | eleq12d 2832 | . . . . . . 7 ⊢ (𝜑 → ({𝑥 ∈ dom 𝐹 ∣ (𝐹‘𝑥) ≤ 𝑎} ∈ (𝑆 ↾t dom 𝐹) ↔ {𝑥 ∈ 𝐷 ∣ (𝐹‘𝑥) ≤ 𝑎} ∈ (𝑆 ↾t 𝐷))) |
11 | 10 | adantr 481 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑎 ∈ ℝ) → ({𝑥 ∈ dom 𝐹 ∣ (𝐹‘𝑥) ≤ 𝑎} ∈ (𝑆 ↾t dom 𝐹) ↔ {𝑥 ∈ 𝐷 ∣ (𝐹‘𝑥) ≤ 𝑎} ∈ (𝑆 ↾t 𝐷))) |
12 | 7, 11 | mpbird 256 | . . . . 5 ⊢ ((𝜑 ∧ 𝑎 ∈ ℝ) → {𝑥 ∈ dom 𝐹 ∣ (𝐹‘𝑥) ≤ 𝑎} ∈ (𝑆 ↾t dom 𝐹)) |
13 | 12 | ex 413 | . . . 4 ⊢ (𝜑 → (𝑎 ∈ ℝ → {𝑥 ∈ dom 𝐹 ∣ (𝐹‘𝑥) ≤ 𝑎} ∈ (𝑆 ↾t dom 𝐹))) |
14 | 6, 13 | ralrimi 3240 | . . 3 ⊢ (𝜑 → ∀𝑎 ∈ ℝ {𝑥 ∈ dom 𝐹 ∣ (𝐹‘𝑥) ≤ 𝑎} ∈ (𝑆 ↾t dom 𝐹)) |
15 | 4, 5, 14 | 3jca 1128 | . 2 ⊢ (𝜑 → (dom 𝐹 ⊆ ∪ 𝑆 ∧ 𝐹:dom 𝐹⟶ℝ ∧ ∀𝑎 ∈ ℝ {𝑥 ∈ dom 𝐹 ∣ (𝐹‘𝑥) ≤ 𝑎} ∈ (𝑆 ↾t dom 𝐹))) |
16 | issmfled.s | . . 3 ⊢ (𝜑 → 𝑆 ∈ SAlg) | |
17 | eqid 2736 | . . 3 ⊢ dom 𝐹 = dom 𝐹 | |
18 | 16, 17 | issmfle 44957 | . 2 ⊢ (𝜑 → (𝐹 ∈ (SMblFn‘𝑆) ↔ (dom 𝐹 ⊆ ∪ 𝑆 ∧ 𝐹:dom 𝐹⟶ℝ ∧ ∀𝑎 ∈ ℝ {𝑥 ∈ dom 𝐹 ∣ (𝐹‘𝑥) ≤ 𝑎} ∈ (𝑆 ↾t dom 𝐹)))) |
19 | 15, 18 | mpbird 256 | 1 ⊢ (𝜑 → 𝐹 ∈ (SMblFn‘𝑆)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 ∧ w3a 1087 Ⅎwnf 1785 ∈ wcel 2106 ∀wral 3064 {crab 3407 ⊆ wss 3910 ∪ cuni 4865 class class class wbr 5105 dom cdm 5633 ⟶wf 6492 ‘cfv 6496 (class class class)co 7356 ℝcr 11049 ≤ cle 11189 ↾t crest 17301 SAlgcsalg 44520 SMblFncsmblfn 44907 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2707 ax-rep 5242 ax-sep 5256 ax-nul 5263 ax-pow 5320 ax-pr 5384 ax-un 7671 ax-inf2 9576 ax-cc 10370 ax-ac2 10398 ax-cnex 11106 ax-resscn 11107 ax-1cn 11108 ax-icn 11109 ax-addcl 11110 ax-addrcl 11111 ax-mulcl 11112 ax-mulrcl 11113 ax-mulcom 11114 ax-addass 11115 ax-mulass 11116 ax-distr 11117 ax-i2m1 11118 ax-1ne0 11119 ax-1rid 11120 ax-rnegex 11121 ax-rrecex 11122 ax-cnre 11123 ax-pre-lttri 11124 ax-pre-lttrn 11125 ax-pre-ltadd 11126 ax-pre-mulgt0 11127 ax-pre-sup 11128 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3065 df-rex 3074 df-rmo 3353 df-reu 3354 df-rab 3408 df-v 3447 df-sbc 3740 df-csb 3856 df-dif 3913 df-un 3915 df-in 3917 df-ss 3927 df-pss 3929 df-nul 4283 df-if 4487 df-pw 4562 df-sn 4587 df-pr 4589 df-op 4593 df-uni 4866 df-int 4908 df-iun 4956 df-iin 4957 df-br 5106 df-opab 5168 df-mpt 5189 df-tr 5223 df-id 5531 df-eprel 5537 df-po 5545 df-so 5546 df-fr 5588 df-se 5589 df-we 5590 df-xp 5639 df-rel 5640 df-cnv 5641 df-co 5642 df-dm 5643 df-rn 5644 df-res 5645 df-ima 5646 df-pred 6253 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6498 df-fn 6499 df-f 6500 df-f1 6501 df-fo 6502 df-f1o 6503 df-fv 6504 df-isom 6505 df-riota 7312 df-ov 7359 df-oprab 7360 df-mpo 7361 df-om 7802 df-1st 7920 df-2nd 7921 df-frecs 8211 df-wrecs 8242 df-recs 8316 df-rdg 8355 df-1o 8411 df-er 8647 df-map 8766 df-pm 8767 df-en 8883 df-dom 8884 df-sdom 8885 df-fin 8886 df-sup 9377 df-inf 9378 df-card 9874 df-acn 9877 df-ac 10051 df-pnf 11190 df-mnf 11191 df-xr 11192 df-ltxr 11193 df-le 11194 df-sub 11386 df-neg 11387 df-div 11812 df-nn 12153 df-n0 12413 df-z 12499 df-uz 12763 df-q 12873 df-rp 12915 df-ioo 13267 df-ico 13269 df-fl 13696 df-rest 17303 df-salg 44521 df-smblfn 44908 |
This theorem is referenced by: smflim 44989 issmfle2d 45021 |
Copyright terms: Public domain | W3C validator |