6533b7d4fe1ef96bd1262ace

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Cluster tilting for one-dimensional hypersurface singularities

Idun ReitenBernhard KellerOsamu IyamaIgor Burban

subject

Pure mathematicsMathematics(all)General MathematicsMathematical analysisTilting theoryBirational geometryRepresentation theoryMathematics - Algebraic GeometryElliptic curveHypersurfaceSimple (abstract algebra)FOS: MathematicsGravitational singularityRepresentation Theory (math.RT)Algebraic Geometry (math.AG)Mathematics - Representation TheoryAssociative propertyMathematics

description

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 $\tau^2=\id$. In particular, we compute 2-CY tilted algebras for simple and minimally elliptic curve singularities.

10.1016/j.aim.2007.10.007http://dx.doi.org/10.1016/j.aim.2007.10.007