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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 |
|
| Ref | Expression |
|---|---|
| brel |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | brel.1 |
. . 3
| |
| 2 | 1 | ssbri 4077 |
. 2
|
| 3 | brxp 4694 |
. 2
| |
| 4 | 2, 3 | sylib 122 |
1
|
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