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Related theorems GIF version |
| Description: Equality deduction for operation value. |
| Ref | Expression |
|---|---|
| opreq1d.1 | ⊢ (φ → A = B) |
| opreq12d.2 | ⊢ (φ → C = D) |
| Ref | Expression |
|---|---|
| opreq12d | ⊢ (φ → (AFC) = (BFD)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | opreq1d.1 | . . 3 ⊢ (φ → A = B) | |
| 2 | 1 | opreq1d 3970 | . 2 ⊢ (φ → (AFC) = (BFC)) |
| 3 | opreq12d.2 | . . 3 ⊢ (φ → C = D) | |
| 4 | 3 | opreq2d 3971 | . 2 ⊢ (φ → (BFC) = (BFD)) |
| 5 | 2, 4 | eqtrd 1505 | 1 ⊢ (φ → (AFC) = (BFD)) |