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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 3081 | . 2 | |
2 | df-ral 2419 | . 2 | |
3 | 1, 2 | bitr4i 186 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wb 104 wal 1329 wcel 1480 wral 2414 wss 3066 |
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 2119 |
This theorem depends on definitions: df-bi 116 df-nf 1437 df-sb 1736 df-clab 2124 df-cleq 2130 df-clel 2133 df-ral 2419 df-in 3072 df-ss 3079 |
This theorem is referenced by: ssrab 3170 eqsnm 3677 uni0b 3756 uni0c 3757 ssint 3782 ssiinf 3857 sspwuni 3892 dftr3 4025 tfis 4492 rninxp 4977 fnres 5234 eqfnfv3 5513 funimass3 5529 ffvresb 5576 tfrlemibxssdm 6217 tfr1onlembxssdm 6233 tfrcllembxssdm 6246 suplocsr 7610 isbasis2g 12201 tgval2 12209 eltg2b 12212 tgss2 12237 basgen2 12239 bastop1 12241 unicld 12274 neipsm 12312 ssidcn 12368 bdss 13051 |
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