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Mirrors > Home > ILE Home > Th. List > sseq2i | Unicode version |
Description: An equality inference for the subclass relationship. (Contributed by NM, 30-Aug-1993.) |
Ref | Expression |
---|---|
sseq1i.1 |
Ref | Expression |
---|---|
sseq2i |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sseq1i.1 | . 2 | |
2 | sseq2 3121 | . 2 | |
3 | 1, 2 | ax-mp 5 | 1 |
Colors of variables: wff set class |
Syntax hints: wb 104 wceq 1331 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-in 3077 df-ss 3084 |
This theorem is referenced by: sseqtri 3131 sseqtrdi 3145 abss 3166 ssrab 3175 ssintrab 3794 iunpwss 3904 iotass 5105 dffun2 5133 ssimaex 5482 isstructim 11973 isstructr 11974 bj-ssom 13134 ss1oel2o 13189 |
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