Simplicity of Skew Group Rings of Abelian Groups |
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Authors: | Johan Öinert |
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Institution: | 1. Centre for Mathematical Sciences , Lund University , Lund , Sweden johan.oinert@math.lth.se |
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Abstract: | Necessary and sufficient conditions for simplicity of a general skew group ring A ?σ G are not known. In this article, we show that a skew group ring A ?σ G, of an abelian group G, is simple if and only if its centre is a field and A is G-simple. As an application, we show that a transformation group (X, G), where X is a compact Hausdorff space acted upon by an abelian group G, is minimal and faithful if and only if its associated skew group algebra C(X) ?σ G is simple. |
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Keywords: | Ideals Minimality Skew group rings Simplicity Transformation groups |
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