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Mirrors > Home > MPE Home > Th. List > 3eqtri | Structured version Visualization version GIF version |
Description: An inference from three chained equalities. (Contributed by NM, 29-Aug-1993.) |
Ref | Expression |
---|---|
3eqtri.1 | ⊢ 𝐴 = 𝐵 |
3eqtri.2 | ⊢ 𝐵 = 𝐶 |
3eqtri.3 | ⊢ 𝐶 = 𝐷 |
Ref | Expression |
---|---|
3eqtri | ⊢ 𝐴 = 𝐷 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 3eqtri.1 | . 2 ⊢ 𝐴 = 𝐵 | |
2 | 3eqtri.2 | . . 3 ⊢ 𝐵 = 𝐶 | |
3 | 3eqtri.3 | . . 3 ⊢ 𝐶 = 𝐷 | |
4 | 2, 3 | eqtri 2767 | . 2 ⊢ 𝐵 = 𝐷 |
5 | 1, 4 | eqtri 2767 | 1 ⊢ 𝐴 = 𝐷 |
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