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关于举行黄泽军教授(深圳大学)学术报告会的通知

发布时间:2024-04-24文章来源:华南理工大学数学学院浏览次数:210

报告主题:    An extremal problem on digraphs

    :    黄泽军教授

报告时间:    2024427日(星期六)上午10:00-11:00

报告地点:    腾讯会议:483942539  密码:9962

    :     林鸿莺副教授

 

欢迎广大师生前往!

数学学院

2024 424

 

报告摘要:Let n and k be integers larger than or equal to 2. If D is a simple digraph on n vertices such that it does not contain two distinct walks of length k with the same initial vertex and the same terminal vertex, what is the maximum size of D? This problem is equivalent to the following: what is the maximum number of ones in an n×n matrix A such that both A and Ak are 0-1 matrices? In this talk, we will present the solution to this problem. This talk is based on joint work with Zhenhua Lyu, Pu Qiao and Xingzhi Zhan.

 

报告人介绍:黄泽军,深圳大学数学科学学院教授、博士生导师。研究兴趣包括图论、组合矩阵论和量子信息科学中的矩阵问题。已在Canadian J. Math.SIAM J. Matrix Anal. Appl.Discrete Math.等期刊发表论文30余篇,担任学术期刊 Electronic Journal of Linear Algebra 编委。