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数学学科2022系列学术报告之二十六

来源:理学院 发布日期:2022-12-02

  报告题目:Cohomology theory of difference Lie groups

  报告人:黎允楠,广州大学数学与信息科学学院,副教授

  报告时间:2022年12月9日 9:30-10:30.

  报告地点:腾讯会议:757747420

  报告摘要:A difference Lie group is a Lie group equipped with a difference operator, equivalently a crossed homomorphism with respect to the adjoint action. In this talk, first we introduce the notion of a representation of a difference Lie group, and establish the relation between representations of difference Lie groups and representations of difference Lie algebras via differentiation and integration. Then we introduce a cohomology theory for difference Lie groups and justify it via the van Est theorem. As applications, all abelian extensions of difference Lie groups are classified using the second cohomology group .This is joint work with Jun Jiang and Yunhe Sheng.

  报告人简介:黎允楠,广州大学数学与信息科学学院副教授,博士毕业于华东师范大学数学系,研究方向为李代数、量子群与代数组合,现与合作者在Math. Z., Pacific J. Math., J. Combin. Theory Ser. A, J. Algebra, J. Algebraic Combin.等数学期刊发表论文十余篇。2015年成为美国数学会数学评论网评论员,2018-2019国家公派美国罗格斯大学研修访问,2020年认定为广州市青年后备人才,2021年成为德国数学文摘数据库评论员。


  报告题目: On the center of the modular super Yangian Y(m|n)

  报告人:常浩,华中师范大学,副教授

  报告时间:2022年12月9日 10:30-11:30.

  报告地点:腾讯会议:757747420

  报告摘要:In this talk, I will introduce the super Yangian Y(m|n)associated to the general linear Lie superalgebra gl(m|n) over a field of positive characteristic. We extend Drinfeld-type presentations of Y(m|n) and the special super Yangian SY(m|n) to positive characteristic. Moreover, the center Z(Y(m|n)) of Y(m|n) is described: it is generated by its Harish-Chandra center together with a large p-center. We also study the p-center of SY(m|n) and provide another description of the p-center of Y(m|n) in terms of the RTT generators. This is a joint work with Hongmei Hu.

  报告人简介:常浩,华中师范大学副教授,研究方向为素特征域上的李代数和表示理论。 在 Representation Theory, J. Pure Appl. Algebra, Algebras and Representation theory, Math. Proc. Cambridge Philos. Soc. 等期刊发表论文10余篇。 主持国家自然科学基金青年项目。