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Mirrors > Home > ILE Home > Th. List > df-topn | Unicode version |
Description: Define the topology extractor function. This differs from df-tset 12524 when a structure has been restricted using df-iress 12440; in this case the TopSet component will still have a topology over the larger set, and this function fixes this by restricting the topology as well. (Contributed by Mario Carneiro, 13-Aug-2015.) |
Ref | Expression |
---|---|
df-topn |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ctopn 12624 |
. 2
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2 | vw |
. . 3
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3 | cvv 2737 |
. . 3
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4 | 2 | cv 1352 |
. . . . 5
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5 | cts 12511 |
. . . . 5
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6 | 4, 5 | cfv 5211 |
. . . 4
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7 | cbs 12432 |
. . . . 5
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8 | 4, 7 | cfv 5211 |
. . . 4
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9 | crest 12623 |
. . . 4
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10 | 6, 8, 9 | co 5868 |
. . 3
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11 | 2, 3, 10 | cmpt 4061 |
. 2
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12 | 1, 11 | wceq 1353 |
1
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Colors of variables: wff set class |
This definition is referenced by: topnfn 12628 topnvalg 12635 |
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