| Mathbox for Glauco Siliprandi |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > smfpimne | Structured version Visualization version GIF version | ||
| Description: Given a function measurable w.r.t. to a sigma-algebra, the preimage of reals that are different from a value in the extended reals is in the subspace of sigma-algebra induced by its domain. (Contributed by Glauco Siliprandi, 5-Jan-2025.) |
| Ref | Expression |
|---|---|
| smfpimne.p | ⊢ Ⅎ𝑥𝜑 |
| smfpimne.x | ⊢ Ⅎ𝑥𝐹 |
| smfpimne.s | ⊢ (𝜑 → 𝑆 ∈ SAlg) |
| smfpimne.f | ⊢ (𝜑 → 𝐹 ∈ (SMblFn‘𝑆)) |
| smfpimne.d | ⊢ 𝐷 = dom 𝐹 |
| smfpimne.a | ⊢ (𝜑 → 𝐴 ∈ ℝ*) |
| Ref | Expression |
|---|---|
| smfpimne | ⊢ (𝜑 → {𝑥 ∈ 𝐷 ∣ (𝐹‘𝑥) ≠ 𝐴} ∈ (𝑆 ↾t 𝐷)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | smfpimne.p | . . 3 ⊢ Ⅎ𝑥𝜑 | |
| 2 | smfpimne.s | . . . . . 6 ⊢ (𝜑 → 𝑆 ∈ SAlg) | |
| 3 | smfpimne.f | . . . . . 6 ⊢ (𝜑 → 𝐹 ∈ (SMblFn‘𝑆)) | |
| 4 | smfpimne.d | . . . . . 6 ⊢ 𝐷 = dom 𝐹 | |
| 5 | 2, 3, 4 | smff 47836 | . . . . 5 ⊢ (𝜑 → 𝐹:𝐷⟶ℝ) |
| 6 | 5 | ffvelcdmda 7085 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → (𝐹‘𝑥) ∈ ℝ) |
| 7 | 6 | rexrd 11363 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → (𝐹‘𝑥) ∈ ℝ*) |
| 8 | smfpimne.a | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℝ*) | |
| 9 | 8 | adantr 486 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → 𝐴 ∈ ℝ*) |
| 10 | 1, 7, 9 | pimxrneun 46592 | . 2 ⊢ (𝜑 → {𝑥 ∈ 𝐷 ∣ (𝐹‘𝑥) ≠ 𝐴} = ({𝑥 ∈ 𝐷 ∣ (𝐹‘𝑥) < 𝐴} ∪ {𝑥 ∈ 𝐷 ∣ 𝐴 < (𝐹‘𝑥)})) |
| 11 | 2, 3, 4 | smfdmss 47837 | . . . . 5 ⊢ (𝜑 → 𝐷 ⊆ ∪ 𝑆) |
| 12 | 2, 11 | subsaluni 47464 | . . . 4 ⊢ (𝜑 → 𝐷 ∈ (𝑆 ↾t 𝐷)) |
| 13 | eqid 2760 | . . . 4 ⊢ (𝑆 ↾t 𝐷) = (𝑆 ↾t 𝐷) | |
| 14 | 2, 12, 13 | subsalsal 47463 | . . 3 ⊢ (𝜑 → (𝑆 ↾t 𝐷) ∈ SAlg) |
| 15 | smfpimne.x | . . . 4 ⊢ Ⅎ𝑥𝐹 | |
| 16 | 15, 2, 3, 4, 8 | smfpimltxr 47851 | . . 3 ⊢ (𝜑 → {𝑥 ∈ 𝐷 ∣ (𝐹‘𝑥) < 𝐴} ∈ (𝑆 ↾t 𝐷)) |
| 17 | 15, 2, 3, 4, 8 | smfpimgtxr 47884 | . . 3 ⊢ (𝜑 → {𝑥 ∈ 𝐷 ∣ 𝐴 < (𝐹‘𝑥)} ∈ (𝑆 ↾t 𝐷)) |
| 18 | 14, 16, 17 | saluncld 47452 | . 2 ⊢ (𝜑 → ({𝑥 ∈ 𝐷 ∣ (𝐹‘𝑥) < 𝐴} ∪ {𝑥 ∈ 𝐷 ∣ 𝐴 < (𝐹‘𝑥)}) ∈ (𝑆 ↾t 𝐷)) |
| 19 | 10, 18 | eqeltrd 2860 | 1 ⊢ (𝜑 → {𝑥 ∈ 𝐷 ∣ (𝐹‘𝑥) ≠ 𝐴} ∈ (𝑆 ↾t 𝐷)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1569 Ⅎwnf 1815 ∈ wcel 2144 Ⅎwnfc 2907 ≠ wne 2955 {crab 3412 ∪ cun 4149 class class class wbr 5102 dom cdm 5650 ‘cfv 6539 (class class class)co 7421 ℝcr 11203 ℝ*cxr 11346 < clt 11347 ↾t crest 17597 SAlgcsalg 47412 SMblFncsmblfn 47799 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7752 ax-inf2 9646 ax-cc 10517 ax-cnex 11260 ax-resscn 11261 ax-1cn 11262 ax-icn 11263 ax-addcl 11264 ax-addrcl 11265 ax-mulcl 11266 ax-mulrcl 11267 ax-mulcom 11268 ax-addass 11269 ax-mulass 11270 ax-distr 11271 ax-i2m1 11272 ax-1ne0 11273 ax-1rid 11274 ax-rnegex 11275 ax-rrecex 11276 ax-cnre 11277 ax-pre-lttri 11278 ax-pre-lttrn 11279 ax-pre-ltadd 11280 ax-pre-mulgt0 11281 ax-pre-sup 11282 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 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 3739 df-csb 3847 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-int 4907 df-iun 4952 df-iin 4953 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-se 5604 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6541 df-fn 6542 df-f 6543 df-f1 6544 df-fo 6545 df-f1o 6546 df-fv 6547 df-isom 6548 df-riota 7378 df-ov 7424 df-oprab 7425 df-mpo 7426 df-om 7879 df-1st 8002 df-2nd 8003 df-frecs 8303 df-wrecs 8334 df-recs 8383 df-rdg 8422 df-1o 8480 df-2o 8481 df-er 8721 df-map 8853 df-pm 8854 df-en 8978 df-dom 8979 df-sdom 8980 df-fin 8981 df-sup 9438 df-inf 9439 df-card 10024 df-acn 10027 df-pnf 11349 df-mnf 11350 df-xr 11351 df-ltxr 11352 df-le 11353 df-sub 11547 df-neg 11548 df-div 11978 df-nn 12340 df-n0 12611 df-z 12698 df-uz 12970 df-q 13080 df-rp 13125 df-ioo 13484 df-ico 13486 df-fl 13936 df-rest 17599 df-salg 47413 df-smblfn 47800 |
| This theorem is used by: smfpimne2 47944 |
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