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Mirrors > Home > QLE Home > Th. List > comcom2 | Unicode version |
Description: Commutation equivalence. Kalmbach 83 p. 23. Does not use OML. |
Ref | Expression |
---|---|
comcom2.1 |
Ref | Expression |
---|---|
comcom2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | comcom2.1 | . . . . 5 | |
2 | 1 | df-c2 133 | . . . 4 |
3 | ax-a1 30 | . . . . . 6 | |
4 | 3 | lan 77 | . . . . 5 |
5 | 4 | ax-r5 38 | . . . 4 |
6 | 2, 5 | ax-r2 36 | . . 3 |
7 | ax-a2 31 | . . 3 | |
8 | 6, 7 | ax-r2 36 | . 2 |
9 | 8 | df-c1 132 | 1 |
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