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| Mirrors > Home > ILE Home > Th. List > eqbrtrd | Unicode version | ||
| Description: Substitution of equal classes into a binary relation. (Contributed by NM, 8-Oct-1999.) |
| Ref | Expression |
|---|---|
| eqbrtrd.1 |
|
| eqbrtrd.2 |
|
| Ref | Expression |
|---|---|
| eqbrtrd |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqbrtrd.2 |
. 2
| |
| 2 | eqbrtrd.1 |
. . 3
| |
| 3 | 2 | breq1d 4043 |
. 2
|
| 4 | 1, 3 | mpbird 167 |
1
|
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