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arXiv 0909.4707math.QAmath.RA
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二项式斜多项式环、Artin-Schelter正则性和杨-巴克斯特方程的二项式解

Binomial skew polynomial rings, Artin-Schelter regularity, and binomial solutions of the Yang-Baxter equation

Tatiana Gateva-Ivanova

摘要:

令$k$为字段,$X$为$n$元素的集合。引入并研究了一类二次$k$ -代数\emph{quantum binomial algebras} .我们的主要结果表明,这样一个代数$A$定义了经典杨-巴克斯特方程(YBE)的一个解,当且仅当它的Koszul对偶$A^{!}$是维数为$n,$的Frobenius,其中\emph{regular socle}和$x,y \in X $都满足$xyy=αzzt,$型等式,其中$α\in k \setminus\{0\},$和$z,t \in X$在$A$中满足.我们证明了概念\emph{a binomial skew polynomial ring}和\emph{a binomial solution of YBE}的等价性。这意味着这样一个解的杨-巴克斯特代数是庞加莱-伯克霍夫-维特型的,并且具有许多其他的好性质,例如是Koszul,Noether和Artin-Schelter正则域。

英文摘要:

Let $k$ be a field and $X$ be a set of $n$ elements. We introduce and study a class of quadratic $k$-algebras called \emph{quantum binomial algebras}. Our main result shows that such an algebra $A$ defines a solution of the classical Yang-Baxter equation (YBE), if and only if its Koszul dual $A^{!}$ is Frobenius of dimension $n,$ with a \emph{regular socle} and for each $x,y \in X $ an equality of the type $xyy=αzzt,$ where $α\in k \setminus\{0\},$ and $z,t \in X$ is satisfied in $A$. We prove the equivalence of the notions \emph{a binomial skew polynomial ring} and \emph{a binomial solution of YBE}. This implies that the Yang-Baxter algebra of such a solution is of Poincaré-Birkhoff-Witt type, and possesses a number of other nice properties such as being Koszul, Noetherian, and an Artin-Schelter regular domain.

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