中科院数学与系统科学研究院

数学研究所

学术报告

拓扑研讨班

 

报告人杨文元教授(北京大学)

 Confined subgroups in groups with contracting elements

  2024.04.10(星期10:00-11:00

 :数学院南楼N802

  要:In this talk, we study confined subgroups in groups with contracting elements. This class of subgroups generalizes normal subgroups and has recently received many interests in semi-simple Lie groups. We shall focus on growth of confined subgroups and their relation with conservative action on boundary. Our results apply to fundamental groups of Riemannian manifolds with negative curvature and mapping class groups. This represents a joint work with Inheyok Choi, Ilya Gekhtman, and Tianyi Zheng

报告人简介:杨文元,国家高层次人才计划入选者,博士生导师。本科和硕士毕业于湖南大学,2011年于法国里尔科学技术大学取得博士学位,2011-2013年期间在南巴黎大学从事博士后研究。2014年入职北京大学北京国际数学研究中心。曾获海外高层次青年人才计划支持。主要研究方向是几何群论与低维拓扑,已在Invent Math, Geometry & Topology, Crelle's journal, Journal of Topology, Math Ann等国际知名期刊发表论文多篇。

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