Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > eqeq1i | Structured version Visualization version GIF version |
Description: Inference from equality to equivalence of equalities. (Contributed by NM, 15-Jul-1993.) |
Ref | Expression |
---|---|
eqeq1i.1 | ⊢ 𝐴 = 𝐵 |
Ref | Expression |
---|---|
eqeq1i | ⊢ (𝐴 = 𝐶 ↔ 𝐵 = 𝐶) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqeq1i.1 | . 2 ⊢ 𝐴 = 𝐵 | |
2 | eqeq1 2743 | . 2 ⊢ (𝐴 = 𝐵 → (𝐴 = 𝐶 ↔ 𝐵 = 𝐶)) | |
3 | 1, 2 | ax-mp 5 | 1 ⊢ (𝐴 = 𝐶 ↔ 𝐵 = 𝐶) |
Copyright terms: Public domain | W3C validator |