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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 14646 | . 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 1373 ∈ wcel 2178 ∪ cuni 3865 ‘cfv 5291 Topctop 14630 TopOnctopon 14643 |
| 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 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2180 ax-14 2181 ax-ext 2189 ax-sep 4179 ax-pow 4235 ax-pr 4270 ax-un 4499 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-nf 1485 df-sb 1787 df-eu 2058 df-mo 2059 df-clab 2194 df-cleq 2200 df-clel 2203 df-nfc 2339 df-ral 2491 df-rex 2492 df-rab 2495 df-v 2779 df-sbc 3007 df-un 3179 df-in 3181 df-ss 3188 df-pw 3629 df-sn 3650 df-pr 3651 df-op 3653 df-uni 3866 df-br 4061 df-opab 4123 df-mpt 4124 df-id 4359 df-xp 4700 df-rel 4701 df-cnv 4702 df-co 4703 df-dm 4704 df-iota 5252 df-fun 5293 df-fv 5299 df-topon 14644 |
| This theorem is referenced by: toponunii 14650 toponmax 14658 toponss 14659 toponcom 14660 topgele 14662 topontopn 14670 restuni 14805 resttopon2 14811 lmfval 14825 cnfval 14827 cnpfval 14828 cnprcl2k 14839 ssidcn 14843 iscnp4 14851 cnntr 14858 cncnp 14863 cnptopresti 14871 txtopon 14895 txuni 14896 cnmpt1t 14918 cnmpt2t 14926 cnmpt1res 14929 cnmpt2res 14930 mopnuni 15078 isxms2 15085 limccnp2lem 15309 limccnp2cntop 15310 dvfvalap 15314 dvbss 15318 dvfgg 15321 dvcnp2cntop 15332 dvaddxxbr 15334 dvmulxxbr 15335 |
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