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 Kostka systems and exotic t-structures for reflection groups


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Let W be a complex reflection group, acting on a complex vector space H. Kato has recently introduced the notion of a -Kostka system,- which is a certain collection of finite-dimensional W-equivariant modules for the symmetric algebra on H. In this paper, we show that Kostka systems can be used to construct -exotic- t-structures on the derived category of finite-dimensional modules, and we prove a derived-equivalence result for these t-structures.



Author: Pramod N. Achar

Source: https://archive.org/







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