The Ideal Intersection Property for Groupoid Graded Rings |
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Authors: | Johan Öinert Patrik Lundström |
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Affiliation: | 1. Department of Mathematical Sciences , University of Copenhagen , Copenhagen , Denmark oinert@math.ku.dk;3. Department of Engineering Science , University West , Trollh?ttan , Sweden |
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Abstract: | We show that, if a groupoid graded ring has a grading satisfying a certain nondegeneracy property, then the commutant of the center of the principal component of the ring has the ideal intersection property, that is it intersects nontrivially every nonzero ideal of the ring. Furthermore, we show that for skew groupoid algebras with commutative principal component, the principal component is maximal commutative if and only if it has the ideal intersection property. |
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Keywords: | Commutants Graded rings Ideals Maximal commutative subrings Skew groupoid rings |
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