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arXiv 1706.06503math.RT
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有限表示型簇倾斜代数的极大Green序列

Maximal green sequences for cluster-tilted algebras of finite representation type

Kiyoshi Igusa

摘要:

我们证明了,对于任何代数闭域上的有限表示型的簇倾斜代数,以下三种极大格林序列的定义是等价的:(1)广义交换矩阵的Fomin-Zelevinsky突变的一般定义,(2)Schurian模的前向同正交序列,(3)一般绿色路径的墙交叉点的顺序。与[24]一起,这完成了支持作者与P. J. Apruzzese [1]的工作所需的基础工作,即,以确定其基础图是有向或无向循环的所有箭图的所有最大绿色序列的所有长度,并确定哪些是“线性的”。在与G. Todorov的方法,给出了有限表示型的簇倾斜代数的最大长度的最大Green序列的一个刻划.

英文摘要:

We show that, for any cluster-tilted algebra of finite representation type over an algebraically closed field, the following three definitions of a maximal green sequence are equivalent: (1) the usual definition in terms of Fomin-Zelevinsky mutation of the extended exchange matrix, (2) a forward hom-orthogonal sequence of Schurian modules, (3) the sequence of wall crossings of a generic green path. Together with [24], this completes the foundational work needed to support the author's work with P.J. Apruzzese [1], namely, to determine all lengths of all maximal green sequences for all quivers whose underlying graph is an oriented or unoriented cycle and to determine which are "linear". In an Appendix, written jointly with G. Todorov, we give a conjectural description of maximal green sequences of maximum length for any cluster-tilted algebra of finite representation type.

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