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Mirrors > Home > ILE Home > Th. List > dfss | Unicode version |
Description: Variant of subclass definition df-ss 3124. (Contributed by NM, 3-Sep-2004.) |
Ref | Expression |
---|---|
dfss |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-ss 3124 | . 2 | |
2 | eqcom 2166 | . 2 | |
3 | 1, 2 | bitri 183 | 1 |
Colors of variables: wff set class |
Syntax hints: wb 104 wceq 1342 cin 3110 wss 3111 |
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 1434 ax-gen 1436 ax-ext 2146 |
This theorem depends on definitions: df-bi 116 df-cleq 2157 df-ss 3124 |
This theorem is referenced by: dfss2 3126 onelini 4402 cnvcnv 5050 funimass1 5259 sbthlemi5 6917 dmaddpi 7257 dmmulpi 7258 tgioo 13093 |
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