A New Triangulated Category for Rational Surface Singularities

Details A New Triangulated Category for Rational Surface Singularities A New Triangulated Category for Rational Surface Singularities

2009-05-25

arxiv.org/abs/0905.3940v2

Mathematics

Algebraic Geometry

15 pages, minor changes. Final version

Scientific paper

In this short paper we introduce a new triangulated category for rational surface singularities which in the non-Gorenstein case acts as a substitute for the stable category of matrix factorizations. The category is formed as a Frobenius quotient of the category of special CM modules, and we classify the relatively projective-injective objects and thus describe the AR quiver of the quotient. Connections to the corresponding reconstruction algebras are also discussed.

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