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arXiv 1806.01449math.RT
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循环Nakayama代数的$φ$ -维数

The $φ$-Dimension of Cyclic Nakayama Algebras

Emre Sen

摘要:

K. Igusa和G.托多罗夫介绍了$φ$函数,它概括了投射维数的概念。研究了无限整体维数循环Nakayama代数的$φ$函数的性质。我们证明了$φ$的值的上确界总是一个偶数。特别是我们证明了$φ$ -维是$2$当且仅当代数满足一定的对称条件。同时,我们也给出了$φ$ -维数的一个精确的上界,它是由描述代数的单项关系的个数来表示的。

英文摘要:

K. Igusa and G. Todorov introduced the $φ$ function which generalizes the notion of projective dimension. We study the behavior of the $φ$ function for cyclic Nakayama algebras of infinite global dimension. We prove that the supremum of values of $φ$ is always an even number. In particular we show that the $φ$-dimension is $2$ if and only if the algebra satisfies certain symmetry conditions. Also we give a sharp upper bound for $φ$-dimension in terms of the number of monomial relations which describes the algebra.

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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