Description: Define the distance function component of a metric space (structure). (Contributed by NM, 4-Sep-2011) (Revised by Mario Carneiro, 14-Aug-2015)
Ref | Expression | ||
---|---|---|---|
Assertion | df-ds | ⊢ dist = Slot ; 1 2 |
Step | Hyp | Ref | Expression |
---|---|---|---|
0 | cds | ⊢ dist | |
1 | c1 | ⊢ 1 | |
2 | c2 | ⊢ 2 | |
3 | 1 2 | cdc | ⊢ ; 1 2 |
4 | 3 | cslot | ⊢ Slot ; 1 2 |
5 | 0 4 | wceq | ⊢ dist = Slot ; 1 2 |