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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 12774 |
. 2
| |
| 2 | c1 7882 |
. . . 4
| |
| 3 | c2 9043 |
. . . 4
| |
| 4 | 2, 3 | cdc 9459 |
. . 3
|
| 5 | 4 | cslot 12687 |
. 2
|
| 6 | 1, 5 | wceq 1364 |
1
|
| Colors of variables: wff set class |
| This definition is referenced by: dsndx 12898 dsid 12899 dsslid 12900 |
| Copyright terms: Public domain | W3C validator |