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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 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cds 12545 |
. 2
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2 | c1 7812 |
. . . 4
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3 | c2 8970 |
. . . 4
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4 | 2, 3 | cdc 9384 |
. . 3
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5 | 4 | cslot 12461 |
. 2
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6 | 1, 5 | wceq 1353 |
1
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Colors of variables: wff set class |
This definition is referenced by: dsndx 12666 dsid 12667 dsslid 12668 |
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