Geometry and the zero sets of semi-invariants for homogeneous modules over canonical algebras

Details Geometry and the zero sets of semi-invariants for homogeneous modules over canonical algebras Geometry and the zero sets of semi-invariants for homogeneous modules over canonical algebras

2006-03-09

arxiv.org/abs/math/0603216v2

Mathematics

Representation Theory

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Scientific paper

We characterize the canonical algebras such that for all dimension vectors of homogeneous modules the corresponding module varieties are complete intersections (respectively, normal). We also investigate the sets of common zeros of semi-invariants of non-zero degree in important cases. In particular, we show that for sufficiently big vectors they are complete intersections and calculate the number of their irreducible components.

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