We consider a Dedekind domain D and a Z-graded ring R s R with [igZ i R s D and each R s D¨being a free D-module of rank 1. The structure of R is 0 i i Ž .
Modules over Crossed Products
β Scribed by A. Jaikin-Zapirain
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 194 KB
- Volume
- 215
- Category
- Article
- ISSN
- 0021-8693
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β¦ Synopsis
left ideal of the Weyl algebra A K over a field K of characteristic 0 can be n generated by two elements. In general, there is the problem of determining whether any left ideal of a Noetherian simple domain can be generated by two elements. In this work we show that this property holds for some crossed products of a simple ring with a supersolvable group and also for the tensor product of generalized Weyl algebras. We also prove that these rings are stably generated by 2 elements and that their finitely generated torsion left modules can be generated by two elements. Some results about stably 2-generated rings were found by Ε½ .
π SIMILAR VOLUMES
We characterize noncommutative Frobenius algebras A in terms of the existence of a coproduct which is a map of left A e -modules. We show that the category Ε½ . of right left comodules over A, relative to this coproduct, is isomorphic to the Ε½ . category of right left modules. This isomorphism enable