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 |