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Related theorems GIF version |
| Description: An equality transitivity deduction. |
| Ref | Expression |
|---|---|
| syl5eq.1 | ⊢ (φ → A = B) |
| syl5eq.2 | ⊢ C = A |
| Ref | Expression |
|---|---|
| syl5eq | ⊢ (φ → C = B) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | syl5eq.2 | . . 3 ⊢ C = A | |
| 2 | 1 | a1i 8 | . 2 ⊢ (φ → C = A) |
| 3 | syl5eq.1 | . 2 ⊢ (φ → A = B) | |
| 4 | 2, 3 | eqtrd 1550 | 1 ⊢ (φ → C = B) |