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Mirrors > Home > QLE Home > Th. List > anass | Unicode version |
Description: Associative law. |
Ref | Expression |
---|---|
anass |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-a3 32 | . . . 4 | |
2 | df-a 40 | . . . . . 6 | |
3 | 2 | con2 67 | . . . . 5 |
4 | 3 | ax-r5 38 | . . . 4 |
5 | df-a 40 | . . . . . 6 | |
6 | 5 | con2 67 | . . . . 5 |
7 | 6 | lor 70 | . . . 4 |
8 | 1, 4, 7 | 3tr1 63 | . . 3 |
9 | 8 | ax-r4 37 | . 2 |
10 | df-a 40 | . 2 | |
11 | df-a 40 | . 2 | |
12 | 9, 10, 11 | 3tr1 63 | 1 |
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