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Bilinear forms on Green rings of finite dimensional Hopf algebras

Friday, September 29th, 2017, 3:00 PM  闵行校区数学楼401报告厅

We study the Green ring and the stable Green ring of a finite dimensional Hopf algebra by means of bilinear forms. We show that the Green ring of a Hopf algebra of finite representation type is a Frobenius algebra over $\mathbb{Z}$ with a dual basis associated to almost split sequences. On the stable Green ring we define a new bilinear form which is more accurate to determine the bi-Frobenius algebra structure on the stable Green ring. We show that the complexified stable Green algebra is a group-like algebra, and hence a bi-Frobenius algebra, if the bilinear form on the stable Green ring is non-degenerate.

主办单位:数学系 科技处

主持人:胡乃红 教授
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