Description: Define ring multiplication. (Contributed by NM, 4-Sep-2011) (Revised by Mario Carneiro, 14-Aug-2015) Use its index-independent form mulrid instead. (New usage is discouraged.)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | df-mulr | ⊢ .r = Slot 3 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 0 | cmulr | ⊢ .r | |
| 1 | c3 | ⊢ 3 | |
| 2 | 1 | cslot | ⊢ Slot 3 |
| 3 | 0 2 | wceq | ⊢ .r = Slot 3 |