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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 46817 | . . 3 ⊢ (𝜑 → ∅ ∈ 𝑆) |
| 4 | 1 | adantr 480 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑆) → 𝑂 ∈ OutMeas) |
| 5 | simpr 484 | . . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑆) → 𝑥 ∈ 𝑆) | |
| 6 | 4, 2, 5 | caragendifcl 46825 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑆) → (∪ 𝑆 ∖ 𝑥) ∈ 𝑆) |
| 7 | 6 | ralrimiva 3129 | . . 3 ⊢ (𝜑 → ∀𝑥 ∈ 𝑆 (∪ 𝑆 ∖ 𝑥) ∈ 𝑆) |
| 8 | 1 | ad2antrr 727 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝒫 𝑆) ∧ 𝑥 ≼ ω) → 𝑂 ∈ OutMeas) |
| 9 | elpwi 4562 | . . . . . . 7 ⊢ (𝑥 ∈ 𝒫 𝑆 → 𝑥 ⊆ 𝑆) | |
| 10 | 9 | ad2antlr 728 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝒫 𝑆) ∧ 𝑥 ≼ ω) → 𝑥 ⊆ 𝑆) |
| 11 | simpr 484 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝒫 𝑆) ∧ 𝑥 ≼ ω) → 𝑥 ≼ ω) | |
| 12 | 8, 2, 10, 11 | caragenunicl 46835 | . . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝒫 𝑆) ∧ 𝑥 ≼ ω) → ∪ 𝑥 ∈ 𝑆) |
| 13 | 12 | ex 412 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝒫 𝑆) → (𝑥 ≼ ω → ∪ 𝑥 ∈ 𝑆)) |
| 14 | 13 | ralrimiva 3129 | . . 3 ⊢ (𝜑 → ∀𝑥 ∈ 𝒫 𝑆(𝑥 ≼ ω → ∪ 𝑥 ∈ 𝑆)) |
| 15 | 3, 7, 14 | 3jca 1129 | . 2 ⊢ (𝜑 → (∅ ∈ 𝑆 ∧ ∀𝑥 ∈ 𝑆 (∪ 𝑆 ∖ 𝑥) ∈ 𝑆 ∧ ∀𝑥 ∈ 𝒫 𝑆(𝑥 ≼ ω → ∪ 𝑥 ∈ 𝑆))) |
| 16 | 2 | fvexi 6849 | . . . 4 ⊢ 𝑆 ∈ V |
| 17 | 16 | a1i 11 | . . 3 ⊢ (𝜑 → 𝑆 ∈ V) |
| 18 | issal 46625 | . . 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 257 | 1 ⊢ (𝜑 → 𝑆 ∈ SAlg) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∧ w3a 1087 = wceq 1542 ∈ wcel 2114 ∀wral 3052 Vcvv 3441 ∖ cdif 3899 ⊆ wss 3902 ∅c0 4286 𝒫 cpw 4555 ∪ cuni 4864 class class class wbr 5099 ‘cfv 6493 ωcom 7810 ≼ cdom 8885 SAlgcsalg 46619 OutMeascome 46800 CaraGenccaragen 46802 |
| 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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5225 ax-sep 5242 ax-nul 5252 ax-pow 5311 ax-pr 5378 ax-un 7682 ax-inf2 9554 ax-ac2 10377 ax-cnex 11086 ax-resscn 11087 ax-1cn 11088 ax-icn 11089 ax-addcl 11090 ax-addrcl 11091 ax-mulcl 11092 ax-mulrcl 11093 ax-mulcom 11094 ax-addass 11095 ax-mulass 11096 ax-distr 11097 ax-i2m1 11098 ax-1ne0 11099 ax-1rid 11100 ax-rnegex 11101 ax-rrecex 11102 ax-cnre 11103 ax-pre-lttri 11104 ax-pre-lttrn 11105 ax-pre-ltadd 11106 ax-pre-mulgt0 11107 ax-pre-sup 11108 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3062 df-rmo 3351 df-reu 3352 df-rab 3401 df-v 3443 df-sbc 3742 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4287 df-if 4481 df-pw 4557 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-int 4904 df-iun 4949 df-disj 5067 df-br 5100 df-opab 5162 df-mpt 5181 df-tr 5207 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-se 5579 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6260 df-ord 6321 df-on 6322 df-lim 6323 df-suc 6324 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-isom 6502 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-om 7811 df-1st 7935 df-2nd 7936 df-frecs 8225 df-wrecs 8256 df-recs 8305 df-rdg 8343 df-1o 8399 df-2o 8400 df-oadd 8403 df-omul 8404 df-er 8637 df-map 8769 df-en 8888 df-dom 8889 df-sdom 8890 df-fin 8891 df-sup 9349 df-inf 9350 df-oi 9419 df-card 9855 df-acn 9858 df-ac 10030 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 df-sub 11370 df-neg 11371 df-div 11799 df-nn 12150 df-2 12212 df-3 12213 df-n0 12406 df-z 12493 df-uz 12756 df-q 12866 df-rp 12910 df-xadd 13031 df-ico 13271 df-icc 13272 df-fz 13428 df-fzo 13575 df-seq 13929 df-exp 13989 df-hash 14258 df-cj 15026 df-re 15027 df-im 15028 df-sqrt 15162 df-abs 15163 df-clim 15415 df-sum 15614 df-salg 46620 df-sumge0 46674 df-ome 46801 df-caragen 46803 |
| This theorem is referenced by: caratheodory 46839 |
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