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Mirrors > Home > ILE Home > Th. List > df-cld | Unicode version |
Description: Define a function on topologies whose value is the set of closed sets of the topology. (Contributed by NM, 2-Oct-2006.) |
Ref | Expression |
---|---|
df-cld |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ccld 13252 |
. 2
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2 | vj |
. . 3
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3 | ctop 13155 |
. . 3
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4 | 2 | cv 1352 |
. . . . . . 7
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5 | 4 | cuni 3807 |
. . . . . 6
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6 | vx |
. . . . . . 7
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7 | 6 | cv 1352 |
. . . . . 6
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8 | 5, 7 | cdif 3126 |
. . . . 5
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9 | 8, 4 | wcel 2148 |
. . . 4
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10 | 5 | cpw 3574 |
. . . 4
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11 | 9, 6, 10 | crab 2459 |
. . 3
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12 | 2, 3, 11 | cmpt 4061 |
. 2
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13 | 1, 12 | wceq 1353 |
1
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Colors of variables: wff set class |
This definition is referenced by: fncld 13258 cldval 13259 |
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