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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 Parry–Sullivan invariant ： ウィキペディア英語版 Parry–Sullivan invariant In mathematics, the Parry–Sullivan invariant (or Parry–Sullivan number) is a numerical quantity of interest in the study of incidence matrices in graph theory, and of certain one-dimensional dynamical systems. It provides a partial classification of non-trivial irreducible incidence matrices. It is named after the English mathematician Bill Parry and the American mathematician Dennis Sullivan, who introduced the invariant in a joint paper published in the journal ''Topology'' in 1975. ==Definition== Let ''A'' be an ''n'' × ''n'' incidence matrix. Then the Parry–Sullivan number of ''A'' is defined to be :$\backslash mathrm\; (A)\; =\; \backslash det\; (I\; -\; A),\; \backslash ,$ where ''I'' denotes the ''n'' × ''n'' identity matrix. 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「Parry–Sullivan invariant」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.