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Mirrors > Home > ILE Home > Th. List > brel | Unicode version |
Description: Two things in a binary relation belong to the relation's domain. (Contributed by NM, 17-May-1996.) (Revised by Mario Carneiro, 26-Apr-2015.) |
Ref | Expression |
---|---|
brel.1 |
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Ref | Expression |
---|---|
brel |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | brel.1 |
. . 3
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2 | 1 | ssbri 4045 |
. 2
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3 | brxp 4655 |
. 2
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4 | 2, 3 | sylib 122 |
1
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