On Representation Rings in the Context of Monoidal Categories

来源 :International Short-School/Conference on Affine Algebraic Ge | 被引量 : 0次 | 上传用户:lym50691064
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  In general,representation rings are well-known as Green rings from module categories of Hopf algebras.In this paper,we study Green rings in the context of monoidal categories such that representations of Hopf algebras can be investigated through Green rings of various levels from module categories to derived categories in the unified view-point.Firstly,as analogue of representation rings of Hopf algebras,we set up the so-called Green rings of monoidal categories,and then list some such categories including module categories,complex categories,homotopy categories,derived categories and(derived)shift categories,etc.and the relationship among their corresponding Green rings.The main part of this paper is to characterize representation rings and derived rings of a class of Hopf algebras constructed from Nakayama truncated algebras,denoted concretely as KZn/Jd.For the representation ring r(KZn/Jd),we completely determine its generators and the relations of generators via the method of Pascal triangle.For the derived ring dr(KZn/J2)(i.e.,d = 2),we determine its generators and give the relations of generators.In these two aspects,the polynomial characterizations of the representation ring and the derived ring are both given.
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