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2005-08-16
On a class of Koszul algebras associated to directed graphs
Vladimir RetakhShirlei SerconekRobert Lee Wilson
文献摘要
In math.QA/0506507 I. Gelfand and the authors introduced and studied a new class of algebras associated to directed graphs. In this paper we show that these algebras are Koszul for a large class of layered (i.e. ranked) graphs.
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