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Noun
1. subsetMathematics
Wikipedia definition
2. SubsetIn mathematics, especially in set theory, a set A is a subset of a set B, or equivalently B is a superset of A, if A is "contained" inside B. A and B may coincide. The relationship of one set being a subset of another is called inclusion or sometimes containment.
Read “Subset” on English Wikipedia
Read “部分集合” on Japanese Wikipedia
Read “Subset” on DBpedia

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