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Related theorems GIF version |
| Description: Equality theorem for operations. |
| Ref | Expression |
|---|---|
| opreq2 | ⊢ (A = B → (CFA) = (CFB)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | opeq2 1877 | . . 3 ⊢ (A = B → 〈C, A〉 = 〈C, B〉) | |
| 2 | 1 | fveq2d 2836 | . 2 ⊢ (A = B → (F ‘〈C, A〉) = (F ‘〈C, B〉)) |
| 3 | df-opr 3003 | . 2 ⊢ (CFA) = (F ‘〈C, A〉) | |
| 4 | df-opr 3003 | . 2 ⊢ (CFB) = (F ‘〈C, B〉) | |
| 5 | 2, 3, 4 | 3eqtr4g 1147 | 1 ⊢ (A = B → (CFA) = (CFB)) |