Quantum affine algebras and KLR algebras

讲座时间 Datetime: 2023年3月21日，星期二，9：30-11：30

地点 Venue：中大珠海校区海琴二号A418

报告人 Speaker: 李建荣 教授

单位 Affiliation: University of Vienna

主持人 Host：黄敏 副教授

报告摘要 Abstract:

Recently, Baumann-Kamnitzer-Knutson introduced a remarkable algebra morphism: \bar{D} from C[N] to the field of rational functions C(a_1, ..., a_n), where N is the unipotent radical of a simply laced complex algebraic group and a_i are simple roots, in their proof of a conjecture of Muthiah about MV basis of C[N]. The algebra C[N] and a larger algebra K_0(C^{\xi}) have monoidal categorifications using representations of quantum affine algebras introduced by Hernandez and Leclerc. We defined an algebra morphism \tilde{D} from K_0(C^{\xi}) to C(a_1, ..., a_n) and proved that when restricts to C[N], \tilde{D} coincides with \bar{D}. Moreover, using \tilde{D} and \bar{D}, we can recover information of q-characters of representations of quantum affine algebras from ungraded characters of modules of KLR algebras and vice versa. This is joint work with Elie Casbi.

报告人简介：

李建荣博士，从事量子仿射代数、丛代数和数学物理等方面的研究，曾在希伯来大学、威兹曼研究所、格拉兹大学等访问或做研究工作，曾主持和参与完成多项国家自然科学基金、海外基金，在JHEP、IMRN、Select Math.等国际著名期刊发表论文20余篇。