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| Mirrors > Home > ILE Home > Th. List > toponuni | GIF version | ||
| Description: The base set of a topology on a given base set. (Contributed by Mario Carneiro, 13-Aug-2015.) |
| Ref | Expression |
|---|---|
| toponuni | ⊢ (𝐽 ∈ (TopOn‘𝐵) → 𝐵 = ∪ 𝐽) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | istopon 14730 | . 2 ⊢ (𝐽 ∈ (TopOn‘𝐵) ↔ (𝐽 ∈ Top ∧ 𝐵 = ∪ 𝐽)) | |
| 2 | 1 | simprbi 275 | 1 ⊢ (𝐽 ∈ (TopOn‘𝐵) → 𝐵 = ∪ 𝐽) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1395 ∈ wcel 2200 ∪ cuni 3891 ‘cfv 5324 Topctop 14714 TopOnctopon 14727 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4205 ax-pow 4262 ax-pr 4297 ax-un 4528 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-rab 2517 df-v 2802 df-sbc 3030 df-un 3202 df-in 3204 df-ss 3211 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3892 df-br 4087 df-opab 4149 df-mpt 4150 df-id 4388 df-xp 4729 df-rel 4730 df-cnv 4731 df-co 4732 df-dm 4733 df-iota 5284 df-fun 5326 df-fv 5332 df-topon 14728 |
| This theorem is referenced by: toponunii 14734 toponmax 14742 toponss 14743 toponcom 14744 topgele 14746 topontopn 14754 restuni 14889 resttopon2 14895 lmfval 14910 cnfval 14911 cnpfval 14912 cnprcl2k 14923 ssidcn 14927 iscnp4 14935 cnntr 14942 cncnp 14947 cnptopresti 14955 txtopon 14979 txuni 14980 cnmpt1t 15002 cnmpt2t 15010 cnmpt1res 15013 cnmpt2res 15014 mopnuni 15162 isxms2 15169 limccnp2lem 15393 limccnp2cntop 15394 dvfvalap 15398 dvbss 15402 dvfgg 15405 dvcnp2cntop 15416 dvaddxxbr 15418 dvmulxxbr 15419 |
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