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arXiv 1402.4559math.RA
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Frobenius代数的Nakayama自同构

Nakayama automorphisms of Frobenius algebras

Will Murray

摘要:

证明了域$k$上Frobenius代数$R$的Nakayama自同构与域无关(定理4).因此,左$R$ -模上的$k$ -对偶函子和$R$的$k$ -对偶的双模同构类型,以及因此$R$是否是对称$k$ -代数的问题,都独立于$k$。我们给出了无限域上的有限维代数是对称代数的一个充分必要的纯环论条件(定理7)。关键词:中山自同构,Frobenius代数,弗罗贝尼乌斯环,对称代数,对偶模,对偶函子,双模,Brauer等价。

英文摘要:

We show that the Nakayama automorphism of a Frobenius algebra $R$ over a field $k$ is independent of the field (Theorem 4). Consequently, the $k$-dual functor on left $R$-modules and the bimodule isomorphism type of the $k$-dual of $R$, and hence the question of whether $R$ is a symmetric $k$-algebra, are independent of $k$. We give a purely ring-theoretic condition that is necessary and sufficient for a finite-dimensional algebra over an infinite field to be a symmetric algebra (Theorem 7). Key words: Nakayama automorphism, Frobenius algebra, Frobenius ring, symmetric algebra, dual module, dual functor, bimodule, Brauer Equivalence.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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