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Mirrors > Home > ILE Home > Th. List > sbceq1dd | Unicode version |
Description: Equality theorem for class substitution. (Contributed by Mario Carneiro, 9-Feb-2017.) (Revised by NM, 30-Jun-2018.) |
Ref | Expression |
---|---|
sbceq1d.1 | |
sbceq1dd.2 |
Ref | Expression |
---|---|
sbceq1dd |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sbceq1dd.2 | . 2 | |
2 | sbceq1d.1 | . . 3 | |
3 | 2 | sbceq1d 2820 | . 2 |
4 | 1, 3 | mpbid 145 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wceq 1284 wsbc 2815 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-5 1376 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-4 1440 ax-17 1459 ax-ial 1467 ax-ext 2063 |
This theorem depends on definitions: df-bi 115 df-cleq 2074 df-clel 2077 df-sbc 2816 |
This theorem is referenced by: prmind2 10502 |
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