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Related theorems Unicode version |
| Description: Equality theorem for operation value. |
| Ref | Expression |
|---|---|
| opreq1 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | opeq1 2487 |
. . 3
| |
| 2 | 1 | fveq2d 3728 |
. 2
|
| 3 | df-opr 3965 |
. 2
| |
| 4 | df-opr 3965 |
. 2
| |
| 5 | 2, 3, 4 | 3eqtr4g 1531 |
1
|