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Mirrors > Home > ILE Home > Th. List > unitg | Unicode version |
Description: The topology generated by a basis is a topology on . Importantly, this theorem means that we don't have to specify separately the base set for the topological space generated by a basis. In other words, any member of the class completely specifies the basis it corresponds to. (Contributed by NM, 16-Jul-2006.) (Proof shortened by OpenAI, 30-Mar-2020.) |
Ref | Expression |
---|---|
unitg |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | tg1 12231 | . . . . . 6 | |
2 | velpw 3517 | . . . . . 6 | |
3 | 1, 2 | sylibr 133 | . . . . 5 |
4 | 3 | ssriv 3101 | . . . 4 |
5 | sspwuni 3897 | . . . 4 | |
6 | 4, 5 | mpbi 144 | . . 3 |
7 | 6 | a1i 9 | . 2 |
8 | bastg 12233 | . . 3 | |
9 | 8 | unissd 3760 | . 2 |
10 | 7, 9 | eqssd 3114 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wceq 1331 wcel 1480 wss 3071 cpw 3510 cuni 3736 cfv 5123 ctg 12138 |
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-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-topgen 12144 |
This theorem is referenced by: tgcl 12236 tgtopon 12238 txtopon 12434 uniretop 12697 |
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