Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > topbas | Unicode version |
Description: A topology is its own basis. (Contributed by NM, 17-Jul-2006.) |
Ref | Expression |
---|---|
topbas |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | inopn 12170 | . . . . . . 7 | |
2 | 1 | 3expb 1182 | . . . . . 6 |
3 | simpr 109 | . . . . . . 7 | |
4 | ssid 3117 | . . . . . . 7 | |
5 | 3, 4 | jctir 311 | . . . . . 6 |
6 | eleq2 2203 | . . . . . . . 8 | |
7 | sseq1 3120 | . . . . . . . 8 | |
8 | 6, 7 | anbi12d 464 | . . . . . . 7 |
9 | 8 | rspcev 2789 | . . . . . 6 |
10 | 2, 5, 9 | syl2an2r 584 | . . . . 5 |
11 | 10 | exp31 361 | . . . 4 |
12 | 11 | ralrimdv 2511 | . . 3 |
13 | 12 | ralrimivv 2513 | . 2 |
14 | isbasis2g 12212 | . 2 | |
15 | 13, 14 | mpbird 166 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 wceq 1331 wcel 1480 wral 2416 wrex 2417 cin 3070 wss 3071 ctop 12164 ctb 12209 |
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-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-sep 4046 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ral 2421 df-rex 2422 df-v 2688 df-in 3077 df-ss 3084 df-pw 3512 df-uni 3737 df-top 12165 df-bases 12210 |
This theorem is referenced by: resttop 12339 txtop 12429 |
Copyright terms: Public domain | W3C validator |