*主讲人：杨文元 副教授（北京国际数学研究中心） 、

*主持人：邹燕清 青年研究员            

*时间：2020年10月17日9:00-10:00

*地点：腾讯会议ID：570 925 367 

*讲座内容简介：

Croke-Kleiner admissible groups firstly introduced by Croke-Kleiner belong to a particular class of graph of groups which generalize fundamental groups of 3-dimensional graph manifolds. In this talk, we will present a characterization of strongly quasiconvex subgroups by the finiteness of height.  With further assumption on the vertex groups, we show that a CKA group satisfies a property (QT) introduced by Bestvina-Bromberg-Fujiwara that the group admits an equivariant quasi-isometric embedding into a finite product of quasi-trees. This is a joint work with Hoang Nguyen.

*主讲人简介：

杨文元，北京国际数学研究中心副教授，主要研究方向为几何群论和低维拓扑。