Type D quiver representation varieties, double Grassmannians, and symmetric varieties
We unify aspects of the equivariant geometry of type $D$ quiver representation varieties, double Grassmannians, and symmetric varieties $GL(a+b)/GL(a)\times GL(b)$; in particular we translate results about singularities of orbit closures, combinatorics of orbit closure containment, and torus equivar...
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Main Authors | , |
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Format | Journal Article |
Language | English |
Published |
28.01.2019
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Subjects | |
Online Access | Get full text |
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Summary: | We unify aspects of the equivariant geometry of type $D$ quiver
representation varieties, double Grassmannians, and symmetric varieties
$GL(a+b)/GL(a)\times GL(b)$; in particular we translate results about
singularities of orbit closures, combinatorics of orbit closure containment,
and torus equivariant $K$-theory between these three families. These results
are all obtained from our generalization of a construction of Zelevinsky for
type $A$ quivers to the type $D$ setting. More precisely, we give explicit
embeddings with nice properties of homogeneous fiber bundles over type $D$
quiver representation varieties into these symmetric varieties. |
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DOI: | 10.48550/arxiv.1901.10014 |