Description: Define group operation. (Contributed by NM, 4-Sep-2011) (Revised by Mario Carneiro, 14-Aug-2015)
Ref | Expression | ||
---|---|---|---|
Assertion | df-plusg | ⊢ +g = Slot 2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
0 | cplusg | ⊢ +g | |
1 | c2 | ⊢ 2 | |
2 | 1 | cslot | ⊢ Slot 2 |
3 | 0 2 | wceq | ⊢ +g = Slot 2 |