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Church-Kleene ordinal : ウィキペディア英語版 | Church–Kleene ordinal In mathematics, the Church–Kleene ordinal, , named after Alonzo Church and S. C. Kleene, is a large countable ordinal. It is the set of all recursive ordinals and the smallest non-recursive ordinal. It is also the first ordinal which is not hyperarithmetical, and the first admissible ordinal after ''ω''. ==References==
* * * * uthor1-link=Alonzo Church | last2=Kleene | first2=S. C. | author2-link=Stephen Cole Kleene | title=Formal definitions in the theory of ordinal numbers. | jfm=63.0029.02 | year=1937 | journal=Fundamenta mathematicae, Warszawa, | volume=28 | pages=11–21}} * * *
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「Church–Kleene ordinal」の詳細全文を読む
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