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Mirrors > Home > ILE Home > Th. List > breq1 | Unicode version |
Description: Equality theorem for a binary relation. (Contributed by NM, 31-Dec-1993.) |
Ref | Expression |
---|---|
breq1 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | opeq1 3777 |
. . 3
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2 | 1 | eleq1d 2246 |
. 2
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3 | df-br 4002 |
. 2
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4 | df-br 4002 |
. 2
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5 | 2, 3, 4 | 3bitr4g 223 |
1
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