| Metamath Proof Explorer |
< Previous
Next >
Related theorems Unicode version |
| Description: A member of a basis is a subset of the topology it generates. |
| Ref | Expression |
|---|---|
| bastg |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | basis1 8883 |
. . . . . 6
| |
| 2 | 1 | 3anidm23 1156 |
. . . . 5
|
| 3 | inidm 2803 |
. . . . 5
| |
| 4 | pweq 3036 |
. . . . . . . 8
| |
| 5 | 3, 4 | ax-mp 7 |
. . . . . . 7
|
| 6 | 5 | ineq2i 2793 |
. . . . . 6
|
| 7 | 6 | unieqi 3187 |
. . . . 5
|
| 8 | 2, 3, 7 | 3sstr3g 2657 |
. . . 4
|
| 9 | 8 | ex 402 |
. . 3
|
| 10 | eltg 8888 |
. . 3
| |
| 11 | 9, 10 | sylibrd 221 |
. 2
|
| 12 | 11 | ssrdv 2622 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: unitg 8893 tgval3 8895 tgtop 8898 tgss2 8907 bastop2 8913 iooretop 8929 elcls3 8987 tx1cn 10223 tx2cn 10224 elsubops 14877 2ndcsb 15476 2ndc1stc 15477 2ndcctbss 15478 topjoin 15527 txsubsp 15912 txopn 15913 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 1304 ax-gen 1305 ax-8 1306 ax-9 1307 ax-10 1308 ax-11 1309 ax-12 1310 ax-13 1311 ax-14 1312 ax-17 1317 ax-4 1319 ax-5o 1321 ax-6o 1324 ax-9o 1481 ax-10o 1500 ax-16 1580 ax-11o 1588 ax-ext 1865 ax-sep 3438 ax-nul 3445 ax-pow 3481 ax-pr 3524 ax-un 3790 |
| This theorem depends on definitions: df-bi 164 df-or 241 df-an 242 df-3an 860 df-ex 1327 df-sb 1536 df-eu 1775 df-mo 1776 df-clab 1872 df-cleq 1877 df-clel 1880 df-ne 2019 df-ral 2109 df-rex 2110 df-v 2294 df-dif 2597 df-un 2600 df-in 2603 df-ss 2605 df-nul 2876 df-pw 3035 df-sn 3049 df-pr 3050 df-op 3053 df-uni 3178 df-br 3339 df-opab 3396 df-id 3586 df-xp 4000 df-rel 4001 df-cnv 4002 df-co 4003 df-dm 4004 df-rn 4005 df-res 4006 df-ima 4007 df-fun 4008 df-fv 4014 df-bases 8863 df-topgen 8864 |