91午夜精品一区二区三区

报告题目：On isomorphisms of Cayley digraphs and bi-Cayley graphs

报告人：谢金华

时间：2024年11月15日（周五）14:30-16:30

地点：豁然楼础510

内容介绍：

Let m be a positive integer. A group G is said to be an m-DCI-group or an m-BCI-group if G has the k-DCI property or k-BCI property for all positive integers k at most m, respectively. Begun with a conjecture proposed by Adam in 1967, finite m-DCI-groups have been extensively studied for over fifty years. Subsequently, finite m-BCI-groups has also been extensively studied by scholars. In this talk, we discuss some isomorphic problems of Cayley digraphs and bi-Cayley graphs over some given groups.

报告题目：A complete classification of shuffle groups

报告人：张志硕

时间：2024年11月15日（周五）14:30-16:30

地点：豁然楼础510

内容介绍：

For positive integers k and n, the shuffle group Gk,kn is generated by the k! permutations of a deck of kn cards performed by cutting the deck into k piles with n cards in each pile, and then perfectly interleaving these cards following a certain permutation of the k piles. In this talk, we present a complete classification of shuffle groups and discuss。

数学与统计学院

2024年11月12日