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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 Star product ： ウィキペディア英語版 Star product :''The term "Star product" may also refer to the Moyal product''. In mathematics, the star product is a method of combining graded posets with unique minimal and maximal elements, preserving the property that the posets are Eulerian. ==Definition== The star product of two graded posets $(P,\backslash le\_P)$ and $(Q,\backslash le\_Q)$, where $P$ has a unique maximal element $\backslash widehat$ and $Q$ has a unique minimal element $\backslash widehat$, is a poset $P$ *Q on the set $(P\backslash setminus\backslash )\backslash cup(Q\backslash setminus\backslash )$. We define the partial order $\backslash le\_$ by $x\backslash le\; y$ if and only if: :1. $\backslash \backslash subset\; P$, and $x\backslash le\_P\; y$; :2. $\backslash \backslash subset\; Q$, and $x\backslash le\_Q\; y$; or :3. $x\backslash in\; P$ and $y\backslash in\; Q$. In other words, we pluck out the top of $P$ and the bottom of $Q$, and require that everything in $P$ be smaller than everything in $Q$. 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「Star product」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.