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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Covering relation ： ウィキペディア英語版 Covering relation In mathematics, especially order theory, the covering relation of a partially ordered set is the binary relation which holds between comparable elements that are immediate neighbours. The covering relation is commonly used to graphically express the partial order by means of the Hasse diagram. == Definition == Let $X$ be a set with a partial order $\backslash le$. As usual, let be the relation on $X$ such that Let $x$ and $y$ be elements of $X$. Then $y$ covers $x$, written $x\backslash lessdot\; y$, if covers $x$ if the interval $()$ is the two-element set $\backslash$. When $x\backslash lessdot\; y$, it is said that $y$ is a cover of $x$. Some authors also use the term cover to denote any such pair $(x,y)$ in the covering relation. 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「Covering relation」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.