报告题目:A right-angled Coxeter group with minimal covolume in a hyperbolic 3-space
报 告 人: Andrei Vesnin 教授 (俄罗斯新西伯利亚索伯列夫数学研究所)
报告时间:2025年7月8日(星期二) 14:30-16:00
报告地点:数学科学学院114(小报告厅)
校内联系人: 李风玲 教授 联系电话:84708351-8515
报告摘要:The problem to find a minimal covolume groups is still actual for many classes of hyperbolic Coxeter groups. We demonstrate that a right-angled Coxeter group in hyperbolic three-dimensional space has the smallest possible covolume if and only if it is generated by reflections in the faces of a polyhedron with six triangular faces, three ideal vertices, and two finite vertices. This group is arithmetic, with a covolume equal to the Catalan constant G, which is approximately 0.915965.
报告人简介:Andrei Vesnin教授,俄罗斯科学院通讯院士、托木斯克大学教授,新西伯利亚国立大学教授、俄罗斯科学院Sobolev 数学研究所应用分析实验室主任,主要从事双曲流形等方面的研究工作,是代数拓扑领域国际知名专家,多次承担国家研究基金项目,多次主办学术会议。