Cluster tilting for one-dimensional hypersurface singularities

Abstract

In this article we study Cohen-Macaulay modules over one-dimensional hypersurface singularities and the relationship with the representation theory of associative algebras using methods of cluster tilting theory. We give a criterion for existence of cluster tilting objects and their complete description by homological methods, using higher almost split sequences and results from birational geometry. We obtain a large class of 2-CY tilted algebras which are finite-dimensional symmetric and satisfy τ2 = id. In particular, we compute 2-CY tilted algebras for simple and minimally elliptic curve singularities. © 2007 Elsevier Inc. All rights reserved.