Union of sets
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Given two sets A and B , the set consisting of all elements contained in either A or B is called the union or join of A and B (the join set), denoted as A ∪ B and read as A join B and A joint (or cup) B. Since A ∪ B still has the feeling of "sum," this is often called the union set. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
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2つの集合 A と B があるとき，A または B のいずれかに含まれるすべての元から成る集合を A ，B の合併または結び (結集合) といい，A∪B で表わし，A 結び B ，A ジョイント (またはカップ) B と読む。 A∪B に「和」の感じが残っているのでこれを和集合と呼ぶことも多い。
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