被覆 (数学)
1. Cover (topology)In mathematics, a cover of a set X is a collection of sets whose union contains X as a subset. Formally, if is an indexed family of sets Uα, then C is a cover of X if
Read “Cover (topology)” on English Wikipedia
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Read “Cover (topology)” on English Wikipedia
Read “被覆 (数学)” on Japanese Wikipedia
Read “Cover (topology)” on DBpedia
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