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Mirrors > Home > MPE Home > Th. List > 3eqtr4i | Structured version Visualization version Unicode version |
Description: An inference from three chained equalities. (Contributed by NM, 26-May-1993.) (Proof shortened by Andrew Salmon, 25-May-2011.) |
Ref | Expression |
---|---|
3eqtr4i.1 | |
3eqtr4i.2 | |
3eqtr4i.3 |
Ref | Expression |
---|---|
3eqtr4i |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 3eqtr4i.2 | . 2 | |
2 | 3eqtr4i.3 | . . 3 | |
3 | 3eqtr4i.1 | . . 3 | |
4 | 2, 3 | eqtr4i 2647 | . 2 |
5 | 1, 4 | eqtr4i 2647 | 1 |
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