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Mirrors > Home > MPE Home > Th. List > oveq12i | Structured version Visualization version GIF version |
Description: Equality inference for operation value. (Contributed by NM, 28-Feb-1995.) (Proof shortened by Andrew Salmon, 22-Oct-2011.) |
Ref | Expression |
---|---|
oveq1i.1 | ⊢ 𝐴 = 𝐵 |
oveq12i.2 | ⊢ 𝐶 = 𝐷 |
Ref | Expression |
---|---|
oveq12i | ⊢ (𝐴𝐹𝐶) = (𝐵𝐹𝐷) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | oveq1i.1 | . 2 ⊢ 𝐴 = 𝐵 | |
2 | oveq12i.2 | . 2 ⊢ 𝐶 = 𝐷 | |
3 | oveq12 7293 | . 2 ⊢ ((𝐴 = 𝐵 ∧ 𝐶 = 𝐷) → (𝐴𝐹𝐶) = (𝐵𝐹𝐷)) | |
4 | 1, 2, 3 | mp2an 689 | 1 ⊢ (𝐴𝐹𝐶) = (𝐵𝐹𝐷) |
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