Hyperbolic localization of intersection cohomology |
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Authors: | Email author" target="_blank">Tom?BradenEmail author |
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Institution: | (1) Department of Mathematics and Statistics, University of Massachusetts, Amherst, MA 01003, USA |
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Abstract: | For a normal variety X defined over an
algebraically closed field with an action of the multiplicative group T = Gm, we consider the "hyperbolic localization" functor Db(X) → Db(XT), which localizes using closed supports in the directions flowing into the fixed points, and compact supports in the directions
flowing out. We show that the hyperbolic localization of the intersection cohomology sheaf is a direct sum of intersection
cohomology sheaves. |
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Keywords: | |
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