On two-geodesic-transitive graphs

发布时间:2025-06-26浏览次数:10

报告人:靳伟 湘潭大学数学与计算科学学院

时间:6月30日(周一)上午10:40-11:40

地点:36-510

摘要:In this talk, we study \left(G,2\right)-geodesic-transitive graphs of odd order. We first give a reduction result on this family of graphs: let N be an intransitive  normal  subgroup of G. Suppose that such a graph \Gamma is neither \left(G,2\right)-arc-transitive nor complete multipartite. Then we show that \Gamma is a cover of \Gamma_N,  G/N is faithful and quasiprimitive on V\left(\Gamma_N\right), \Gamma_N is \left(G/N,s^\prime\right) geodesic transitive of odd order and girth 3 where s^\prime=min2,diam\left(\Gamma_N\right). We next investigate odd order \left(G,2\right)-geodesic-transitive graphs  where G acts quasiprimitively on the vertex set and determine all the possible quasiprimitive action types and give examples for them.

报告人简介:靳伟,湘潭大学教授,博士生导师,江西省“杰青”,江西省青年井冈学者,第八届世界华人数学家大会45分钟邀请报告人,第八届欧洲数学家大会30分钟邀请报告人,博士毕业于西澳大利亚大学,为米纳斯联邦大学博士后。曾在中南大学,江西财经大学,澳大利亚昆士兰大学,拉筹伯大学和斯洛文尼亚Primorska大学等高校工作或访问交流。发表学术论文40余篇,其中多篇论文发表在了J. London Math. Soc., J. Combin. Theory Ser. A,J. Combin. Theory Ser. B,J. Graph Theory等著名期刊上面,主持国家自然科学基金面上基金、国家自然科学基金重点基金子课题等国家课题4项和省部级课题多项。


Baidu
sogou