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图与组合系列讲座之四十一(Andrey Vasil'ev)

  发布日期:2019-04-04  浏览量:148


  

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

: Andrey Vasil'ev (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: 磬苑校区澳门赌搏网站大全H 306

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.

欢迎各位老师、同学届时前往!  

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专家概况:Prof Andrey Vasil'ev is an eminent Russian mathematician in finite group theory. He is Chief Research Fellow at Sobolev Institute of Mathematics, Chair of Algebra and Mathematical Logic at Novosibirsk State University, and Professor of the Russian Academy of Science. Born in 1970, he belongs to the post-CFSG generation. He is leading the study of finite groups after CFSG (Classification of Finite Simple Groups) with his research interest mainly in prime graphs, Shi's problem, 2-closed permutation groups, which is often shared in common with Chinese mathematicians such as Wujie Shi, Guiyun Chen, Wenbin Guo. His recent joint work with Ilya Ponomarenko on Schurian coherent configurations has a great impact on algebraic combinatorics.

 

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