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Mirrors > Home > QLE Home > Th. List > 3tr | GIF version |
Description: Triple transitive inference. (Contributed by NM, 20-Sep-1998.) |
Ref | Expression |
---|---|
3tr.1 | a = b |
3tr.2 | b = c |
3tr.3 | c = d |
Ref | Expression |
---|---|
3tr | a = d |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 3tr.1 | . . 3 a = b | |
2 | 3tr.2 | . . 3 b = c | |
3 | 1, 2 | ax-r2 36 | . 2 a = c |
4 | 3tr.3 | . 2 c = d | |
5 | 3, 4 | ax-r2 36 | 1 a = d |
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