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closure-preserving をテンプレートにして作成
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*Definition [#tea7db0b]
A family of subsets of a topological space is said to be closure-preserving if the closure of the union of any subfamily of the family is the union of the closure of the subfamily. Here we mean the closure of a family of subsets as a family
終了行:
*Definition [#tea7db0b]
A family of subsets of a topological space is said to be closure-preserving if the closure of the union of any subfamily of the family is the union of the closure of the subfamily. Here we mean the closure of a family of subsets as a family
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