报告题目：数学的美与善报告摘要：结合报告人三十多年学习和研究数学的经历和体会，分享对数学的感受和认识，以及研究数学的快乐，并愿意回答大家的提问。报告人：詹兴致 华东师范大学数学科学学院教授，博士生导师主要研究领域为图论和矩阵论，担任或曾经担任 Linear Alge...

报告题目：给定半径和直径的图的最大围长和最小周长摘 要：1973年Ostrand提出了如下两个问题：（1）半径为 r 直径为 d 的图的最大围长是多少？（2）半径为 r 直径为 d 的图的最小周长是多少？问题2被 Hrnciar 在2012年解决了。我们首先解决问题 1，证明最大围长是2r+1。这...

报告题目：Discontinuous Galerkin method for a two-dimensional fractional reaction-diffusion equation from combustion process报告摘要：In this talk, a two-dimensional temporal fractional combustion model with Caputo derivative is considered. We design an...

报告题目：Distribution of trace codes and their applications to secret sharing schemes摘要： We construct several new infinite families of trace codes over rings; they have the algebraic structure of abelian codes. Their Lee weight distribution is comp...

报告题目：Trace codes over Z4 and Boolean functions摘要：We construct trace codes over Z4 based on Boolean functions and their support. The Lee weight distribution of these codes is studied by using the Walsh-Hadamard transform of the Boolean functions,...