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Large Veblen ordinal : ウィキペディア英語版 | Large Veblen ordinal In mathematics, the large Veblen ordinal is a certain large countable ordinal, named after Oswald Veblen. There is no standard notation for ordinals beyond the Feferman–Schütte ordinal Γ0. Most systems of notation use symbols such as ψ(α), θ(α), ψα(β), some of which are modifications of the Veblen functions to produce countable ordinals even for uncountable arguments, and some of which are "collapsing functions". The large Veblen ordinal is sometimes denoted by or or . It was constructed by Veblen using an extension of Veblen functions allowing infinitely many arguments. ==References==
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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「Large Veblen ordinal」の詳細全文を読む
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