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Mirrors > Home > ILE Home > Th. List > dfss | Unicode version |
Description: Variant of subclass definition df-ss 3054. (Contributed by NM, 3-Sep-2004.) |
Ref | Expression |
---|---|
dfss |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-ss 3054 | . 2 | |
2 | eqcom 2119 | . 2 | |
3 | 1, 2 | bitri 183 | 1 |
Colors of variables: wff set class |
Syntax hints: wb 104 wceq 1316 cin 3040 wss 3041 |
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 1408 ax-gen 1410 ax-ext 2099 |
This theorem depends on definitions: df-bi 116 df-cleq 2110 df-ss 3054 |
This theorem is referenced by: dfss2 3056 onelini 4322 cnvcnv 4961 funimass1 5170 sbthlemi5 6817 dmaddpi 7101 dmmulpi 7102 tgioo 12642 |
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