Algebras Generated by Elements with Given Spectrum and Scalar Sum and Kleinian Singularities
classification
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algebrascertainelementsgeneratedgivenkleinianscalarspectrum
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For a certain class of (nonunital) subalgebras of deformed preprojective algebra of affine type we describe their centers as certain deformation of Kleinian singularity and find their PI-degree. These results can be applied to algebras generated by elements with given spectrum and scalar sum.
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