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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 uniform matroid ： ウィキペディア英語版 uniform matroid In mathematics, a uniform matroid is a matroid in which every permutation of the elements is a symmetry. ==Definition== The uniform matroid $U\{\}^r\_n$ is defined over a set of $n$ elements. A subset of the elements is independent if and only if it contains at most $r$ elements. A subset is a basis if it has exactly $r$ elements, and it is a circuit if it has exactly $r+1$ elements. The rank of a subset $S$ is $\backslash min(|S|,r)$ and the rank of the matroid is $r$.〔. For the rank function, see p. 26.〕〔.〕 A matroid of rank $r$ is uniform if and only if all of its circuits have exactly $r+1$ elements.〔, p. 27.〕 The matroid $U\{\}^2\_n$ is called the $n$-point line. 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「uniform matroid」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.