Levy, Paul (2009) Isomorphism problems of noncommutative deformations of type $D$ Kleinian singularities. Transactions of the American Mathematical Society, 361. pp. 2351-2375.
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Official URL: http://dx.doi.org/10.1090/S0002-9947-08-04593-5
Abstract
We construct all possible noncommutative deformations of a Kleinian singularity ${\mathbb C}^2/\Gamma$ of type $D_n$ in terms of generators and relations, and solve the isomorphism problem for the associative algebras thus constructed. We prove that (in our parametrization) all isomorphisms arise from the action of the normalizer $N_{\operatorname{SL}(2)}(\Gamma)$ on ${\mathbb C}/\Gamma$. We deduce that the moduli space of isomorphism classes of noncommutative deformations in type $D_n$ is isomorphic to a vector space of dimension $n$.
| Item Type: | Article |
|---|---|
| Journal or Publication Title: | Transactions of the American Mathematical Society |
| Additional Information: | First published in Trans. Amer. Math. Soc. 361 (2009), published by the American Mathematical Society |
| Subjects: | UNSPECIFIED |
| Departments: | Faculty of Science and Technology > Mathematics and Statistics |
| ID Code: | 51958 |
| Deposited By: | ep_importer_pure |
| Deposited On: | 09 Dec 2011 13:32 |
| Refereed?: | Yes |
| Published?: | Published |
| Last Modified: | 26 Jul 2012 19:59 |
| Identification Number: | |
| URI: | http://eprints.lancs.ac.uk/id/eprint/51958 |
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