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Ackermann set theory : ウィキペディア英語版 | Ackermann set theory
Ackermann set theory is a version of axiomatic set theory proposed by Wilhelm Ackermann in 1956. == The language== Ackermann set theory is formulated in first-order logic. The language consists of one binary relation and one constant (Ackermann used a predicate instead). We will write for . The intended interpretation of is that the object is in the class . The intended interpretation of is the class of all sets.
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「Ackermann set theory」の詳細全文を読む
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