图与组合系列讲座之四十一(Andrey Vasilyev)

永恒彩票 www.jandmtreecare.com 发布时间:2019-04-04作者:访问量:10

报告题目: The 2-closure of permutation groups and the isomorphism problem for schurian coherent configurations

报 告 人: Andrey Vasilyev (索博列夫数学研究所&新西伯利亚州立大学,俄罗斯)

报告时间: 2019412(周五)下午1630

报告地点: 磬苑校区数学科学学院 H 306

欢迎各位老师、同学届时前往!

  

科学技术处

201944

报告摘要:

    Starting in the late 1960s, the theory of coherent configurations has now become one of the central parts of algebraic combinatorics. The main goal of this theory is to provide a common method to study symmetries of combinatorial objects. So it is not surprising that permutation groups provide a rich source of coherent configurations. In fact, there is a natural Galois correspondence between subgroups of symmetric group on a set Ωand coherent configurations defined on  Ω. The closed objects with respect to that correspondence are 2-closed permutation groups and schurian coherent configurations. In this talk we concentrate on the isomorphism problem for two important classes of schurian coherent configurations: 3/2-homogeneous and of rank 3.

  


永恒彩票原图
/

永利彩票 | 永诚彩票网 | 永诚彩票网 | 永诚彩票网 |