Category equivalences involving graded modules over quotients of weighted path algebras

preprint2014arXivOpen access

Abstract

Let kk be a field, QQ a finite directed graph, and kQkQ its path algebra. Make kQkQ an $\NN$-graded algebra by assigning each arrow a positive degree. Let II be a homogeneous ideal in kQkQ and write A=kQ/IA=kQ/I. Let $\QGr A$ denote the quotient of the category of graded right AA-modules modulo the Serre subcategory consisting of those graded modules that are the sum of their finite dimensional submodules. This paper shows there is a finite directed graph Q′Q' with all its arrows placed in degree 1 and a homogeneous ideal I′⊂kQ′I'\subset kQ' such that $\QGr A \equiv \QGr kQ'/I'$. This is an extension of a result obtained by the author and Gautam Sisodia.

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