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Related theorems Unicode version |
| Description: Equality implies equivalence of membership. |
| Ref | Expression |
|---|---|
| eleq1 |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqeq2 1481 |
. . . 4
| |
| 2 | 1 | anbi1d 616 |
. . 3
|
| 3 | 2 | exbidv 1277 |
. 2
|
| 4 | df-clel 1470 |
. 2
| |
| 5 | df-clel 1470 |
. 2
| |
| 6 | 3, 4, 5 | 3bitr4g 554 |
1
|