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arxiv: 1012.2585 · v2 · pith:K7BHW7F5new · submitted 2010-12-12 · 🧮 math.RT

Supports of representations of the rational Cherednik algebra of type A

classification 🧮 math.RT
keywords algebracategoryrepresentationssupportcherednikrationaletingoffinite
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We first consider the rational Cherednik algebra corresponding to the action of a finite group on a complex variety, as defined by Etingof. We define a category of representations of this algebra which is analogous to "category O" for the rational Cherednik algebra of a vector space. We generalise to this setting Bezrukavnikov and Etingof's results about the possible support sets of such representations. Then we focus on the case of $S_n$ acting on $\C^n$, determining which irreducible modules in this category have which support sets. We also show that the category of representations with a given support, modulo those with smaller support, is equivalent to the category of finite dimensional representations of a certain Hecke algebra.

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