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Related theorems Unicode version |
| Description: Equality deduction for a binary relation. (The proof was shortened by Andrew Salmon, 9-Jul-2011.) |
| Ref | Expression |
|---|---|
| breq1d.1 |
|
| breq12d.2 |
|
| Ref | Expression |
|---|---|
| breq12d |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | breq1d.1 |
. 2
| |
| 2 | breq12d.2 |
. 2
| |
| 3 | breq12 3343 |
. 2
| |
| 4 | 1, 2, 3 | syl11anc 524 |
1
|