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| Mirrors > Home > MPE Home > Th. List > Mathboxes > caragensal | Structured version Visualization version GIF version | ||
| Description: Caratheodory's method generates a sigma-algebra. (Contributed by Glauco Siliprandi, 17-Aug-2020.) |
| Ref | Expression |
|---|---|
| caragensal.o | ⊢ (𝜑 → 𝑂 ∈ OutMeas) |
| caragensal.s | ⊢ 𝑆 = (CaraGen‘𝑂) |
| Ref | Expression |
|---|---|
| caragensal | ⊢ (𝜑 → 𝑆 ∈ SAlg) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | caragensal.o | . . . 4 ⊢ (𝜑 → 𝑂 ∈ OutMeas) | |
| 2 | caragensal.s | . . . 4 ⊢ 𝑆 = (CaraGen‘𝑂) | |
| 3 | 1, 2 | caragen0 47085 | . . 3 ⊢ (𝜑 → ∅ ∈ 𝑆) |
| 4 | 1 | adantr 484 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑆) → 𝑂 ∈ OutMeas) |
| 5 | simpr 488 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑆) → 𝑥 ∈ 𝑆) | |
| 6 | 4, 2, 5 | caragendifcl 47093 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑆) → (∪ 𝑆 ∖ 𝑥) ∈ 𝑆) |
| 7 | 6 | ralrimiva 3156 | . . 3 ⊢ (𝜑 → ∀𝑥 ∈ 𝑆 (∪ 𝑆 ∖ 𝑥) ∈ 𝑆) |
| 8 | 1 | ad2antrr 736 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝒫 𝑆) ∧ 𝑥 ≼ ω) → 𝑂 ∈ OutMeas) |
| 9 | elpwi 4564 | . . . . . . 7 ⊢ (𝑥 ∈ 𝒫 𝑆 → 𝑥 ⊆ 𝑆) | |
| 10 | 9 | ad2antlr 737 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝒫 𝑆) ∧ 𝑥 ≼ ω) → 𝑥 ⊆ 𝑆) |
| 11 | simpr 488 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝒫 𝑆) ∧ 𝑥 ≼ ω) → 𝑥 ≼ ω) | |
| 12 | 8, 2, 10, 11 | caragenunicl 47103 | . . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝒫 𝑆) ∧ 𝑥 ≼ ω) → ∪ 𝑥 ∈ 𝑆) |
| 13 | 12 | ex 416 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝒫 𝑆) → (𝑥 ≼ ω → ∪ 𝑥 ∈ 𝑆)) |
| 14 | 13 | ralrimiva 3156 | . . 3 ⊢ (𝜑 → ∀𝑥 ∈ 𝒫 𝑆(𝑥 ≼ ω → ∪ 𝑥 ∈ 𝑆)) |
| 15 | 3, 7, 14 | 3jca 1142 | . 2 ⊢ (𝜑 → (∅ ∈ 𝑆 ∧ ∀𝑥 ∈ 𝑆 (∪ 𝑆 ∖ 𝑥) ∈ 𝑆 ∧ ∀𝑥 ∈ 𝒫 𝑆(𝑥 ≼ ω → ∪ 𝑥 ∈ 𝑆))) |
| 16 | 2 | fvexi 6883 | . . . 4 ⊢ 𝑆 ∈ V |
| 17 | 16 | a1i 11 | . . 3 ⊢ (𝜑 → 𝑆 ∈ V) |
| 18 | issal 46893 | . . 3 ⊢ (𝑆 ∈ V → (𝑆 ∈ SAlg ↔ (∅ ∈ 𝑆 ∧ ∀𝑥 ∈ 𝑆 (∪ 𝑆 ∖ 𝑥) ∈ 𝑆 ∧ ∀𝑥 ∈ 𝒫 𝑆(𝑥 ≼ ω → ∪ 𝑥 ∈ 𝑆)))) | |
| 19 | 17, 18 | syl 17 | . 2 ⊢ (𝜑 → (𝑆 ∈ SAlg ↔ (∅ ∈ 𝑆 ∧ ∀𝑥 ∈ 𝑆 (∪ 𝑆 ∖ 𝑥) ∈ 𝑆 ∧ ∀𝑥 ∈ 𝒫 𝑆(𝑥 ≼ ω → ∪ 𝑥 ∈ 𝑆)))) |
| 20 | 15, 19 | mpbird 259 | 1 ⊢ (𝜑 → 𝑆 ∈ SAlg) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 208 ∧ wa 399 ∧ w3a 1099 = wceq 1562 ∈ wcel 2144 ∀wral 3078 Vcvv 3456 ∖ cdif 3903 ⊆ wss 3906 ∅c0 4287 𝒫 cpw 4557 ∪ cuni 4867 class class class wbr 5102 ‘cfv 6523 ωcom 7848 ≼ cdom 8927 SAlgcsalg 46887 OutMeascome 47068 CaraGenccaragen 47070 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1817 ax-4 1831 ax-5 1932 ax-6 1989 ax-7 2030 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2214 ax-ext 2736 ax-rep 5229 ax-sep 5248 ax-nul 5258 ax-pow 5324 ax-pr 5392 ax-un 7720 ax-inf2 9598 ax-ac2 10422 ax-cnex 11131 ax-resscn 11132 ax-1cn 11133 ax-icn 11134 ax-addcl 11135 ax-addrcl 11136 ax-mulcl 11137 ax-mulrcl 11138 ax-mulcom 11139 ax-addass 11140 ax-mulass 11141 ax-distr 11142 ax-i2m1 11143 ax-1ne0 11144 ax-1rid 11145 ax-rnegex 11146 ax-rrecex 11147 ax-cnre 11148 ax-pre-lttri 11149 ax-pre-lttrn 11150 ax-pre-ltadd 11151 ax-pre-mulgt0 11152 ax-pre-sup 11153 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1100 df-3an 1101 df-tru 1565 df-fal 1575 df-ex 1802 df-nf 1806 df-sb 2093 df-mo 2568 df-eu 2598 df-clab 2743 df-cleq 2756 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3458 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4288 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-disj 5070 df-br 5103 df-opab 5165 df-mpt 5184 df-tr 5210 df-id 5544 df-eprel 5549 df-po 5557 df-so 5558 df-fr 5602 df-se 5603 df-we 5604 df-xp 5655 df-rel 5656 df-cnv 5657 df-co 5658 df-dm 5659 df-rn 5660 df-res 5661 df-ima 5662 df-pred 6290 df-ord 6351 df-on 6352 df-lim 6353 df-suc 6354 df-iota 6479 df-fun 6525 df-fn 6526 df-f 6527 df-f1 6528 df-fo 6529 df-f1o 6530 df-fv 6531 df-isom 6532 df-riota 7355 df-ov 7401 df-oprab 7402 df-mpo 7403 df-om 7849 df-1st 7972 df-2nd 7973 df-frecs 8264 df-wrecs 8295 df-recs 8344 df-rdg 8383 df-1o 8439 df-2o 8440 df-oadd 8443 df-omul 8444 df-er 8680 df-map 8812 df-en 8930 df-dom 8931 df-sdom 8932 df-fin 8933 df-sup 9390 df-inf 9391 df-oi 9460 df-card 9899 df-acn 9902 df-ac 10074 df-pnf 11220 df-mnf 11221 df-xr 11222 df-ltxr 11223 df-le 11224 df-sub 11418 df-neg 11419 df-div 11847 df-nn 12213 df-2 12282 df-3 12283 df-n0 12484 df-z 12571 df-uz 12842 df-q 12952 df-rp 12996 df-xadd 13117 df-ico 13357 df-icc 13358 df-fz 13515 df-fzo 13662 df-seq 14017 df-exp 14077 df-hash 14346 df-cj 15128 df-re 15129 df-im 15130 df-sqrt 15264 df-abs 15265 df-clim 15517 df-sum 15716 df-salg 46888 df-sumge0 46942 df-ome 47069 df-caragen 47071 |
| This theorem is referenced by: caratheodory 47107 |
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