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Mirrors > Home > ILE Home > Th. List > funeq | Unicode version |
Description: Equality theorem for function predicate. (Contributed by NM, 16-Aug-1994.) |
Ref | Expression |
---|---|
funeq |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqimss2 3192 | . . 3 | |
2 | funss 5201 | . . 3 | |
3 | 1, 2 | syl 14 | . 2 |
4 | eqimss 3191 | . . 3 | |
5 | funss 5201 | . . 3 | |
6 | 4, 5 | syl 14 | . 2 |
7 | 3, 6 | impbid 128 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wb 104 wceq 1342 wss 3111 wfun 5176 |
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 699 ax-5 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-10 1492 ax-11 1493 ax-i12 1494 ax-bndl 1496 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 ax-i5r 1522 ax-ext 2146 |
This theorem depends on definitions: df-bi 116 df-nf 1448 df-sb 1750 df-clab 2151 df-cleq 2157 df-clel 2160 df-nfc 2295 df-in 3117 df-ss 3124 df-br 3977 df-opab 4038 df-rel 4605 df-cnv 4606 df-co 4607 df-fun 5184 |
This theorem is referenced by: funeqi 5203 funeqd 5204 fununi 5250 funcnvuni 5251 cnvresid 5256 fneq1 5270 elpmg 6621 fundmeng 6764 |
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