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In topology, a preclosure operator or Čech closure operator is a map between subsets of a set, similar to a topological closure operator, except that it is not required to be idempotent. That is, a preclosure operator obeys only three of the four Kuratowski closure axioms.
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preclosure operator displaystyle topology closure set sequential map mathcal respect seq text čech topological idempotent following closed open generated given
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Preclosure operator | is a | topology | 0.90 | text |
| Preclosure operator | related to Sequential spaces | The | 0.60 | section |
| Preclosure operator | related to Sequential spaces | Given | 0.60 | section |
| Preclosure operator | related to Topology | The | 0.60 | section |
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