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Squared cycles in monomial relations algebras
Authors:Brian Jue
Affiliation:(1) Department of Mathematics, California State University, Stanislaus, Turlock, California 95382, USA
Abstract:Let 
$$mathbb{K}$$
be an algebraically closed field. Consider a finite dimensional monomial relations algebra 
$$Lambda  = {{mathbb{K}Gamma } mathord{left/ {vphantom {{mathbb{K}Gamma } I}} right. kern-nulldelimiterspace} I}$$
of finite global dimension, where Γ is a quiver and I an admissible ideal generated by a set of paths from the path algebra 
$$mathbb{K}Gamma $$
. There are many modules over Λ which may be represented graphically by a tree with respect to a top element, of which the indecomposable projectives are the most natural example. These trees possess branches which correspond to right subpaths of cycles in the quiver. A pattern in the syzygies of a specific factor module of the corresponding indecomposable projective module is found, allowing us to conclude that the square of any cycle must lie in the ideal I.
Keywords:Representation theory  homological dimension  syzygies
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