Intersection cohomology on nonrational polytopes

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Viewing a fan as a partially ordered set (of cones) we consider a category of sheaves on the fan which corresponds to a category of equivariant sheaves on the corresponding toric variety if the fan is rational. In this category we define an object which corresponds to the equivariant intersection cohomology complex. Our first main result is the ``elementary'' decomposition theorem for the direct image under subdivision of fans We also develop the Borel-Moore- Verdier duality in the derived category of sheaves on the fan.

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Algebraic Geometry, Combinatorics

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http://salesiana.dossiersoluciones.com/handle/123456789/58609

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0002006
 http://arxiv.org/abs/math/0002006

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arXiv