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Mirrors > Home > MPE Home > Th. List > eqtr3di | Structured version Visualization version GIF version |
Description: An equality transitivity deduction. (Contributed by NM, 29-Mar-1998.) |
Ref | Expression |
---|---|
eqtr3di.1 | ⊢ (𝜑 → 𝐴 = 𝐵) |
eqtr3di.2 | ⊢ 𝐴 = 𝐶 |
Ref | Expression |
---|---|
eqtr3di | ⊢ (𝜑 → 𝐵 = 𝐶) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqtr3di.2 | . . 3 ⊢ 𝐴 = 𝐶 | |
2 | 1 | eqcomi 2747 | . 2 ⊢ 𝐶 = 𝐴 |
3 | eqtr3di.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) | |
4 | 2, 3 | eqtr2id 2792 | 1 ⊢ (𝜑 → 𝐵 = 𝐶) |
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