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Mirrors > Home > ILE Home > Th. List > toponmax | Unicode version |
Description: The base set of a topology is an open set. (Contributed by Mario Carneiro, 13-Aug-2015.) |
Ref | Expression |
---|---|
toponmax | TopOn |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | toponuni 12185 | . 2 TopOn | |
2 | topontop 12184 | . . 3 TopOn | |
3 | eqid 2139 | . . . 4 | |
4 | 3 | topopn 12178 | . . 3 |
5 | 2, 4 | syl 14 | . 2 TopOn |
6 | 1, 5 | eqeltrd 2216 | 1 TopOn |
Colors of variables: wff set class |
Syntax hints: wi 4 wcel 1480 cuni 3736 cfv 5123 ctop 12167 TopOnctopon 12180 |
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-top 12168 df-topon 12181 |
This theorem is referenced by: topgele 12199 eltpsg 12210 resttopon 12343 lmfval 12364 cnfval 12366 cnpfval 12367 iscn 12369 cnpval 12370 iscnp 12371 lmbrf 12387 cnconst2 12405 cnrest2 12408 cndis 12413 cnpdis 12414 lmfss 12416 lmres 12420 lmff 12421 tx1cn 12441 tx2cn 12442 txlm 12451 cnmpt2res 12469 mopnm 12620 isxms2 12624 |
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