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Related theorems Unicode version |
| Description: Deduction from equality to equivalence of equalities. |
| Ref | Expression |
|---|---|
| eqeq1d.1 |
|
| Ref | Expression |
|---|---|
| eqeq1d |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqeq1d.1 |
. 2
| |
| 2 | eqeq1 1473 |
. 2
| |
| 3 | 1, 2 | syl 10 |
1
|