Category equivalences involving graded modules over quotients of weighted path algebras

TL;DR

This paper demonstrates an equivalence between certain quotient categories of graded modules over quotients of weighted path algebras and those over unweighted path algebras with degree 1 arrows, extending previous results.

Contribution

It constructs a finite directed graph with all arrows in degree 1 and an ideal such that their quotient categories are equivalent to those of the original weighted algebra.

Findings

Establishes a categorical equivalence for graded modules over weighted path algebra quotients.

Extends previous work to include weighted path algebras with arbitrary positive degrees.

Provides a method to translate weighted algebra problems into unweighted settings.

Abstract

Let $k$ be a field, $Q$ a finite directed graph, and $kQ$ its path algebra. Make $kQ$ an $\NN$-graded algebra by assigning each arrow a positive degree. Let $I$ be a homogeneous ideal in $kQ$ and write $A=kQ/I$. Let $\QGr A$ denote the quotient of the category of graded right $A$-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 $Q'$ with all its arrows placed in degree 1 and a homogeneous ideal $I'\subset kQ'$ such that $\QGr A \equiv \QGr kQ'/I'$. This is an extension of a result obtained by the author and Gautam Sisodia.