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| Mirrors > Home > ILE Home > Th. List > df-ds | Unicode version | ||
| 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 |
|---|---|
| df-ds |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cds 13114 |
. 2
| |
| 2 | c1 7996 |
. . . 4
| |
| 3 | c2 9157 |
. . . 4
| |
| 4 | 2, 3 | cdc 9574 |
. . 3
|
| 5 | 4 | cslot 13026 |
. 2
|
| 6 | 1, 5 | wceq 1395 |
1
|
| Colors of variables: wff set class |
| This definition is referenced by: dsndx 13243 dsid 13244 dsslid 13245 |
| Copyright terms: Public domain | W3C validator |