| Metamath Proof Explorer |
< Previous
Next >
Related theorems Unicode version |
| Description: Equality theorem for function value. |
| Ref | Expression |
|---|---|
| fveq2 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sneq 2422 |
. . . . . 6
| |
| 2 | 1 | imaeq2d 3411 |
. . . . 5
|
| 3 | 2 | eqeq1d 1486 |
. . . 4
|
| 4 | 3 | abbidv 1580 |
. . 3
|
| 5 | 4 | unieqd 2517 |
. 2
|
| 6 | df-fv 3205 |
. 2
| |
| 7 | df-fv 3205 |
. 2
| |
| 8 | 5, 6, 7 | 3eqtr4g 1534 |
1
|