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Mirrors > Home > MPE Home > Th. List > Mathboxes > brsiga | Structured version Visualization version GIF version |
Description: The Borel Algebra on real numbers is a Borel sigma-algebra. (Contributed by Thierry Arnoux, 27-Dec-2016.) |
Ref | Expression |
---|---|
brsiga | ⊢ 𝔅ℝ ∈ (sigaGen “ Top) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-brsiga 32195 | . 2 ⊢ 𝔅ℝ = (sigaGen‘(topGen‘ran (,))) | |
2 | retop 23970 | . . 3 ⊢ (topGen‘ran (,)) ∈ Top | |
3 | df-sigagen 32152 | . . . . 5 ⊢ sigaGen = (𝑥 ∈ V ↦ ∩ {𝑠 ∈ (sigAlgebra‘∪ 𝑥) ∣ 𝑥 ⊆ 𝑠}) | |
4 | 3 | funmpt2 6502 | . . . 4 ⊢ Fun sigaGen |
5 | fvex 6817 | . . . . . 6 ⊢ (topGen‘ran (,)) ∈ V | |
6 | sigagensiga 32154 | . . . . . 6 ⊢ ((topGen‘ran (,)) ∈ V → (sigaGen‘(topGen‘ran (,))) ∈ (sigAlgebra‘∪ (topGen‘ran (,)))) | |
7 | elrnsiga 32139 | . . . . . 6 ⊢ ((sigaGen‘(topGen‘ran (,))) ∈ (sigAlgebra‘∪ (topGen‘ran (,))) → (sigaGen‘(topGen‘ran (,))) ∈ ∪ ran sigAlgebra) | |
8 | 5, 6, 7 | mp2b 10 | . . . . 5 ⊢ (sigaGen‘(topGen‘ran (,))) ∈ ∪ ran sigAlgebra |
9 | 0elsiga 32127 | . . . . 5 ⊢ ((sigaGen‘(topGen‘ran (,))) ∈ ∪ ran sigAlgebra → ∅ ∈ (sigaGen‘(topGen‘ran (,)))) | |
10 | elfvdm 6838 | . . . . 5 ⊢ (∅ ∈ (sigaGen‘(topGen‘ran (,))) → (topGen‘ran (,)) ∈ dom sigaGen) | |
11 | 8, 9, 10 | mp2b 10 | . . . 4 ⊢ (topGen‘ran (,)) ∈ dom sigaGen |
12 | funfvima 7138 | . . . 4 ⊢ ((Fun sigaGen ∧ (topGen‘ran (,)) ∈ dom sigaGen) → ((topGen‘ran (,)) ∈ Top → (sigaGen‘(topGen‘ran (,))) ∈ (sigaGen “ Top))) | |
13 | 4, 11, 12 | mp2an 690 | . . 3 ⊢ ((topGen‘ran (,)) ∈ Top → (sigaGen‘(topGen‘ran (,))) ∈ (sigaGen “ Top)) |
14 | 2, 13 | ax-mp 5 | . 2 ⊢ (sigaGen‘(topGen‘ran (,))) ∈ (sigaGen “ Top) |
15 | 1, 14 | eqeltri 2833 | 1 ⊢ 𝔅ℝ ∈ (sigaGen “ Top) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2104 {crab 3284 Vcvv 3437 ⊆ wss 3892 ∅c0 4262 ∪ cuni 4844 ∩ cint 4886 dom cdm 5600 ran crn 5601 “ cima 5603 Fun wfun 6452 ‘cfv 6458 (,)cioo 13125 topGenctg 17193 Topctop 22087 sigAlgebracsiga 32121 sigaGencsigagen 32151 𝔅ℝcbrsiga 32194 |
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 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2707 ax-sep 5232 ax-nul 5239 ax-pow 5297 ax-pr 5361 ax-un 7620 ax-cnex 10973 ax-resscn 10974 ax-pre-lttri 10991 ax-pre-lttrn 10992 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3or 1088 df-3an 1089 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rab 3287 df-v 3439 df-sbc 3722 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4566 df-pr 4568 df-op 4572 df-uni 4845 df-int 4887 df-iun 4933 df-br 5082 df-opab 5144 df-mpt 5165 df-id 5500 df-po 5514 df-so 5515 df-xp 5606 df-rel 5607 df-cnv 5608 df-co 5609 df-dm 5610 df-rn 5611 df-res 5612 df-ima 5613 df-iota 6410 df-fun 6460 df-fn 6461 df-f 6462 df-f1 6463 df-fo 6464 df-f1o 6465 df-fv 6466 df-ov 7310 df-oprab 7311 df-mpo 7312 df-1st 7863 df-2nd 7864 df-er 8529 df-en 8765 df-dom 8766 df-sdom 8767 df-pnf 11057 df-mnf 11058 df-xr 11059 df-ltxr 11060 df-le 11061 df-ioo 13129 df-topgen 17199 df-top 22088 df-bases 22141 df-siga 32122 df-sigagen 32152 df-brsiga 32195 |
This theorem is referenced by: (None) |
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