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Mirrors > Home > ILE Home > Th. List > topontop | GIF version |
Description: A topology on a given base set is a topology. (Contributed by Mario Carneiro, 13-Aug-2015.) |
Ref | Expression |
---|---|
topontop | ⊢ (𝐽 ∈ (TopOn‘𝐵) → 𝐽 ∈ Top) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | istopon 12180 | . 2 ⊢ (𝐽 ∈ (TopOn‘𝐵) ↔ (𝐽 ∈ Top ∧ 𝐵 = ∪ 𝐽)) | |
2 | 1 | simplbi 272 | 1 ⊢ (𝐽 ∈ (TopOn‘𝐵) → 𝐽 ∈ Top) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1331 ∈ wcel 1480 ∪ cuni 3736 ‘cfv 5123 Topctop 12164 TopOnctopon 12177 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-13 1491 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-sep 4046 ax-pow 4098 ax-pr 4131 ax-un 4355 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-eu 2002 df-mo 2003 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ral 2421 df-rex 2422 df-rab 2425 df-v 2688 df-sbc 2910 df-un 3075 df-in 3077 df-ss 3084 df-pw 3512 df-sn 3533 df-pr 3534 df-op 3536 df-uni 3737 df-br 3930 df-opab 3990 df-mpt 3991 df-id 4215 df-xp 4545 df-rel 4546 df-cnv 4547 df-co 4548 df-dm 4549 df-iota 5088 df-fun 5125 df-fv 5131 df-topon 12178 |
This theorem is referenced by: topontopi 12183 topontopon 12187 toponmax 12192 topgele 12196 istps 12199 topontopn 12204 resttopon 12340 resttopon2 12347 lmfval 12361 cnfval 12363 cnpfval 12364 cnprcl2k 12375 cnpf2 12376 tgcn 12377 tgcnp 12378 iscnp4 12387 cnntr 12394 cncnp 12399 cnptopresti 12407 txtopon 12431 txcnp 12440 txlm 12448 cnmpt2res 12466 mopntop 12613 metcnpi 12684 metcnpi3 12686 dvfvalap 12819 dvfgg 12826 dvaddxxbr 12834 dvmulxxbr 12835 |
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