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Related theorems Unicode version |
| Description: Deduction from equality to equivalence of membership. |
| Ref | Expression |
|---|---|
| eleq1d.1 |
|
| Ref | Expression |
|---|---|
| eleq1d |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eleq1d.1 |
. 2
| |
| 2 | eleq1 1531 |
. 2
| |
| 3 | 1, 2 | syl 10 |
1
|