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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 46511 | . . 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 46519 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑆) → (∪ 𝑆 ∖ 𝑥) ∈ 𝑆) |
| 7 | 6 | ralrimiva 3126 | . . 3 ⊢ (𝜑 → ∀𝑥 ∈ 𝑆 (∪ 𝑆 ∖ 𝑥) ∈ 𝑆) |
| 8 | 1 | ad2antrr 726 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝒫 𝑆) ∧ 𝑥 ≼ ω) → 𝑂 ∈ OutMeas) |
| 9 | elpwi 4573 | . . . . . . 7 ⊢ (𝑥 ∈ 𝒫 𝑆 → 𝑥 ⊆ 𝑆) | |
| 10 | 9 | ad2antlr 727 | . . . . . 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 46529 | . . . . 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 3126 | . . 3 ⊢ (𝜑 → ∀𝑥 ∈ 𝒫 𝑆(𝑥 ≼ ω → ∪ 𝑥 ∈ 𝑆)) |
| 15 | 3, 7, 14 | 3jca 1128 | . 2 ⊢ (𝜑 → (∅ ∈ 𝑆 ∧ ∀𝑥 ∈ 𝑆 (∪ 𝑆 ∖ 𝑥) ∈ 𝑆 ∧ ∀𝑥 ∈ 𝒫 𝑆(𝑥 ≼ ω → ∪ 𝑥 ∈ 𝑆))) |
| 16 | 2 | fvexi 6875 | . . . 4 ⊢ 𝑆 ∈ V |
| 17 | 16 | a1i 11 | . . 3 ⊢ (𝜑 → 𝑆 ∈ V) |
| 18 | issal 46319 | . . 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 1086 = wceq 1540 ∈ wcel 2109 ∀wral 3045 Vcvv 3450 ∖ cdif 3914 ⊆ wss 3917 ∅c0 4299 𝒫 cpw 4566 ∪ cuni 4874 class class class wbr 5110 ‘cfv 6514 ωcom 7845 ≼ cdom 8919 SAlgcsalg 46313 OutMeascome 46494 CaraGenccaragen 46496 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2702 ax-rep 5237 ax-sep 5254 ax-nul 5264 ax-pow 5323 ax-pr 5390 ax-un 7714 ax-inf2 9601 ax-ac2 10423 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 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2879 df-ne 2927 df-nel 3031 df-ral 3046 df-rex 3055 df-rmo 3356 df-reu 3357 df-rab 3409 df-v 3452 df-sbc 3757 df-csb 3866 df-dif 3920 df-un 3922 df-in 3924 df-ss 3934 df-pss 3937 df-nul 4300 df-if 4492 df-pw 4568 df-sn 4593 df-pr 4595 df-op 4599 df-uni 4875 df-int 4914 df-iun 4960 df-disj 5078 df-br 5111 df-opab 5173 df-mpt 5192 df-tr 5218 df-id 5536 df-eprel 5541 df-po 5549 df-so 5550 df-fr 5594 df-se 5595 df-we 5596 df-xp 5647 df-rel 5648 df-cnv 5649 df-co 5650 df-dm 5651 df-rn 5652 df-res 5653 df-ima 5654 df-pred 6277 df-ord 6338 df-on 6339 df-lim 6340 df-suc 6341 df-iota 6467 df-fun 6516 df-fn 6517 df-f 6518 df-f1 6519 df-fo 6520 df-f1o 6521 df-fv 6522 df-isom 6523 df-riota 7347 df-ov 7393 df-oprab 7394 df-mpo 7395 df-om 7846 df-1st 7971 df-2nd 7972 df-frecs 8263 df-wrecs 8294 df-recs 8343 df-rdg 8381 df-1o 8437 df-2o 8438 df-oadd 8441 df-omul 8442 df-er 8674 df-map 8804 df-en 8922 df-dom 8923 df-sdom 8924 df-fin 8925 df-sup 9400 df-inf 9401 df-oi 9470 df-card 9899 df-acn 9902 df-ac 10076 df-pnf 11217 df-mnf 11218 df-xr 11219 df-ltxr 11220 df-le 11221 df-sub 11414 df-neg 11415 df-div 11843 df-nn 12194 df-2 12256 df-3 12257 df-n0 12450 df-z 12537 df-uz 12801 df-q 12915 df-rp 12959 df-xadd 13080 df-ico 13319 df-icc 13320 df-fz 13476 df-fzo 13623 df-seq 13974 df-exp 14034 df-hash 14303 df-cj 15072 df-re 15073 df-im 15074 df-sqrt 15208 df-abs 15209 df-clim 15461 df-sum 15660 df-salg 46314 df-sumge0 46368 df-ome 46495 df-caragen 46497 |
| This theorem is referenced by: caratheodory 46533 |
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