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Mirrors > Home > MPE Home > Th. List > eleq12d | Structured version Visualization version Unicode version |
Description: Deduction from equality to equivalence of membership. (Contributed by NM, 31-May-1994.) |
Ref | Expression |
---|---|
eleq12d.1 | |
eleq12d.2 |
Ref | Expression |
---|---|
eleq12d |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eleq12d.2 | . . 3 | |
2 | 1 | eleq2d 2687 | . 2 |
3 | eleq12d.1 | . . 3 | |
4 | 3 | eleq1d 2686 | . 2 |
5 | 2, 4 | bitrd 268 | 1 |
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