Recollement of Deformed Preprojective Algebras and the Calogero-Moser Correspondence

Details Recollement of Deformed Preprojective Algebras and the Calogero-Moser Correspondence Recollement of Deformed Preprojective Algebras and the Calogero-Moser Correspondence

2007-06-20

arxiv.org/abs/0706.3006v1

Mathematics

Representation Theory

16 pp., LaTex, to appear in Moscow Math. J.(2007)

Scientific paper

The aim of this paper is to clarify the relation between the following objects: $ (a) $ rank 1 projective modules (ideals) over the first Weyl algebra $ A_1(\C)$; $ (b) $ simple modules over deformed preprojective algebras $ \Pi_{\lambda}(Q) $ introduced by Crawley-Boevey and Holland; and $ (c) $ simple modules over the rational Cherednik algebras $ H_{0,c}(S_n) $ associated to symmetric groups. The isomorphism classes of each type of these objects can be parametrized geometrically by the same space (namely, the Calogero-Moser algebraic varieties); however, no natural functors between the corresponding module categories seem to be known. We construct such functors by translating our earlier results on $\A$-modules over $ A_1 $ to a more familiar setting of representation theory. In the last section we extend our construction to the case of Kleinian singularities $ \C^2/\Gamma $, where $ \Gamma $ is a finite cyclic subgroup of $ \SL(2, \C) $.

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