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Hereditary set : ウィキペディア英語版 | Hereditary set In set theory, a hereditary set (or pure set) is a set whose elements are all hereditary sets. That is, all elements of the set are themselves sets, as are all elements of the elements, and so on. ==Examples== For example, it is vacuously true that the empty set is a hereditary set, and thus the set containing only the empty set is a hereditary set.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Hereditary set」の詳細全文を読む
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