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Mirrors > Home > ILE Home > Th. List > eqtri | Unicode version |
Description: An equality transitivity inference. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
eqtri.1 | |
eqtri.2 |
Ref | Expression |
---|---|
eqtri |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqtri.1 | . 2 | |
2 | eqtri.2 | . . 3 | |
3 | 2 | eqeq2i 2181 | . 2 |
4 | 1, 3 | mpbi 144 | 1 |
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