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Mirrors > Home > MPE Home > Th. List > eqrdv | Structured version Visualization version Unicode version |
Description: Deduce equality of classes from equivalence of membership. (Contributed by NM, 17-Mar-1996.) |
Ref | Expression |
---|---|
eqrdv.1 |
Ref | Expression |
---|---|
eqrdv |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqrdv.1 | . . 3 | |
2 | 1 | alrimiv 1855 | . 2 |
3 | dfcleq 2616 | . 2 | |
4 | 2, 3 | sylibr 224 | 1 |
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