Singular Quiver Varieties over Extended Dynkin Quivers

Published 19 Aug 2022 in math.RT and math.DG | (2208.09359v1)

Abstract: We classify the singularities in the unframed Nakajima quiver varieties associated with extended Dynkin quivers and the corresponding minimal imaginary root with a small restriction on the parameter and use this to construct a number of hyper-K\"{a}hler cobordisms between binary polyhedral spaces.

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Authors (1)

Gard Olav Helle

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