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Mirrors > Home > MPE Home > Th. List > breq2 | Structured version Visualization version Unicode version |
Description: Equality theorem for a binary relation. (Contributed by NM, 31-Dec-1993.) |
Ref | Expression |
---|---|
breq2 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | opeq2 4181 |
. . 3
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2 | 1 | eleq1d 2524 |
. 2
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3 | df-br 4417 |
. 2
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4 | df-br 4417 |
. 2
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5 | 2, 3, 4 | 3bitr4g 296 |
1
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