| 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 47305 | . . . . 5 ⊢ (𝜑 → 𝐹:𝐷⟶ℝ) |
| 6 | 5 | ffvelcdmda 7069 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → (𝐹‘𝑥) ∈ ℝ) |
| 7 | 6 | rexrd 11247 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → (𝐹‘𝑥) ∈ ℝ*) |
| 8 | smfpimne.a | . . . 4 ⊢ (𝜑 → 𝐴 ∈ ℝ*) | |
| 9 | 8 | adantr 485 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → 𝐴 ∈ ℝ*) |
| 10 | 1, 7, 9 | pimxrneun 46061 | . 2 ⊢ (𝜑 → {𝑥 ∈ 𝐷 ∣ (𝐹‘𝑥) ≠ 𝐴} = ({𝑥 ∈ 𝐷 ∣ (𝐹‘𝑥) < 𝐴} ∪ {𝑥 ∈ 𝐷 ∣ 𝐴 < (𝐹‘𝑥)})) |
| 11 | 2, 3, 4 | smfdmss 47306 | . . . . 5 ⊢ (𝜑 → 𝐷 ⊆ ∪ 𝑆) |
| 12 | 2, 11 | subsaluni 46933 | . . . 4 ⊢ (𝜑 → 𝐷 ∈ (𝑆 ↾t 𝐷)) |
| 13 | eqid 2765 | . . . 4 ⊢ (𝑆 ↾t 𝐷) = (𝑆 ↾t 𝐷) | |
| 14 | 2, 12, 13 | subsalsal 46932 | . . 3 ⊢ (𝜑 → (𝑆 ↾t 𝐷) ∈ SAlg) |
| 15 | smfpimne.x | . . . 4 ⊢ Ⅎ𝑥𝐹 | |
| 16 | 15, 2, 3, 4, 8 | smfpimltxr 47320 | . . 3 ⊢ (𝜑 → {𝑥 ∈ 𝐷 ∣ (𝐹‘𝑥) < 𝐴} ∈ (𝑆 ↾t 𝐷)) |
| 17 | 15, 2, 3, 4, 8 | smfpimgtxr 47353 | . . 3 ⊢ (𝜑 → {𝑥 ∈ 𝐷 ∣ 𝐴 < (𝐹‘𝑥)} ∈ (𝑆 ↾t 𝐷)) |
| 18 | 14, 16, 17 | saluncld 46921 | . 2 ⊢ (𝜑 → ({𝑥 ∈ 𝐷 ∣ (𝐹‘𝑥) < 𝐴} ∪ {𝑥 ∈ 𝐷 ∣ 𝐴 < (𝐹‘𝑥)}) ∈ (𝑆 ↾t 𝐷)) |
| 19 | 10, 18 | eqeltrd 2865 | 1 ⊢ (𝜑 → {𝑥 ∈ 𝐷 ∣ (𝐹‘𝑥) ≠ 𝐴} ∈ (𝑆 ↾t 𝐷)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 400 = wceq 1563 Ⅎwnf 1806 ∈ wcel 2145 Ⅎwnfc 2912 ≠ wne 2960 {crab 3417 ∪ cun 3905 class class class wbr 5104 dom cdm 5651 ‘cfv 6525 (class class class)co 7400 ℝcr 11087 ℝ*cxr 11230 < clt 11231 ↾t crest 17461 SAlgcsalg 46881 SMblFncsmblfn 47268 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2737 ax-rep 5231 ax-sep 5250 ax-nul 5260 ax-pow 5326 ax-pr 5394 ax-un 7722 ax-inf2 9598 ax-cc 10407 ax-ac2 10435 ax-cnex 11144 ax-resscn 11145 ax-1cn 11146 ax-icn 11147 ax-addcl 11148 ax-addrcl 11149 ax-mulcl 11150 ax-mulrcl 11151 ax-mulcom 11152 ax-addass 11153 ax-mulass 11154 ax-distr 11155 ax-i2m1 11156 ax-1ne0 11157 ax-1rid 11158 ax-rnegex 11159 ax-rrecex 11160 ax-cnre 11161 ax-pre-lttri 11162 ax-pre-lttrn 11163 ax-pre-ltadd 11164 ax-pre-mulgt0 11165 ax-pre-sup 11166 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-nf 1807 df-sb 2094 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3370 df-reu 3371 df-rab 3418 df-v 3459 df-sbc 3748 df-csb 3856 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-pss 3927 df-nul 4289 df-if 4484 df-pw 4560 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4868 df-int 4908 df-iun 4953 df-iin 4954 df-br 5105 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-se 5605 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6291 df-ord 6352 df-on 6353 df-lim 6354 df-suc 6355 df-iota 6481 df-fun 6527 df-fn 6528 df-f 6529 df-f1 6530 df-fo 6531 df-f1o 6532 df-fv 6533 df-isom 6534 df-riota 7357 df-ov 7403 df-oprab 7404 df-mpo 7405 df-om 7851 df-1st 7974 df-2nd 7975 df-frecs 8266 df-wrecs 8297 df-recs 8346 df-rdg 8385 df-1o 8441 df-2o 8442 df-er 8682 df-map 8814 df-pm 8815 df-en 8932 df-dom 8933 df-sdom 8934 df-fin 8935 df-sup 9390 df-inf 9391 df-card 9913 df-acn 9916 df-ac 10088 df-pnf 11233 df-mnf 11234 df-xr 11235 df-ltxr 11236 df-le 11237 df-sub 11431 df-neg 11432 df-div 11860 df-nn 12222 df-n0 12493 df-z 12580 df-uz 12851 df-q 12961 df-rp 13005 df-ioo 13364 df-ico 13366 df-fl 13813 df-rest 17463 df-salg 46882 df-smblfn 47269 |
| This theorem is referenced by: smfpimne2 47413 |
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