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Mirrors > Home > ILE Home > Th. List > dfss3 | Unicode version |
Description: Alternate definition of subclass relationship. (Contributed by NM, 14-Oct-1999.) |
Ref | Expression |
---|---|
dfss3 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dfss2 3086 | . 2 | |
2 | df-ral 2421 | . 2 | |
3 | 1, 2 | bitr4i 186 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wb 104 wal 1329 wcel 1480 wral 2416 wss 3071 |
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-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-11 1484 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 |
This theorem depends on definitions: df-bi 116 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-ral 2421 df-in 3077 df-ss 3084 |
This theorem is referenced by: ssrab 3175 eqsnm 3682 uni0b 3761 uni0c 3762 ssint 3787 ssiinf 3862 sspwuni 3897 dftr3 4030 tfis 4497 rninxp 4982 fnres 5239 eqfnfv3 5520 funimass3 5536 ffvresb 5583 tfrlemibxssdm 6224 tfr1onlembxssdm 6240 tfrcllembxssdm 6253 suplocsr 7617 isbasis2g 12212 tgval2 12220 eltg2b 12223 tgss2 12248 basgen2 12250 bastop1 12252 unicld 12285 neipsm 12323 ssidcn 12379 bdss 13062 |
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