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Mirrors > Home > MPE Home > Th. List > eqtr4di | Structured version Visualization version GIF version |
Description: An equality transitivity deduction. (Contributed by NM, 21-Jun-1993.) |
Ref | Expression |
---|---|
eqtr4di.1 | ⊢ (𝜑 → 𝐴 = 𝐵) |
eqtr4di.2 | ⊢ 𝐶 = 𝐵 |
Ref | Expression |
---|---|
eqtr4di | ⊢ (𝜑 → 𝐴 = 𝐶) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqtr4di.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) | |
2 | eqtr4di.2 | . . 3 ⊢ 𝐶 = 𝐵 | |
3 | 2 | eqcomi 2768 | . 2 ⊢ 𝐵 = 𝐶 |
4 | 1, 3 | eqtrdi 2810 | 1 ⊢ (𝜑 → 𝐴 = 𝐶) |
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