应数学与计算科学学院、广西应用数学中心(桂林电子科技大学)及广西高校数据分析与计算重点实验室邀请，美国中佛罗里达大学孙颀彧教授将于2025年5月15日来校讲学，欢迎全校师生踊跃参加。报告具体安排如下：

  报告题目：Shift-invariant, bandlimited and shift-invariant reproducing kernel spaces on undirected graphs

  主讲人：孙颀彧教授

  时间：2025年5月15日（周四）下午3:00 -

  地点：花江校区慧谷4号楼3楼310报告厅

  报告摘要：A shift-invariant space of functions on the line is a linear space invariant under integer shifts, which has been widely used in approximation theory, wavelet analysis, sampling theory, Gabor analysis and many other mathematical and engineering fields. In this talk, I will introduce the concept of graph shift-invariant space (GSIS) on an undirected finite graph, and study its bandlimiting, kernel reproducing and sampling properties. Based on the nested Krylov structure of GSISs in the spatial domain, we propose a novel sampling and reconstruction algorithm with finite steps, with its performance tested for flight delay dataset of the 50 busiest airports in the USA.

  主讲人简介：孙颀彧，美国中佛罗里达大学数学系教授。主要从事傅里叶分析、小波分析、框架理论、信号采样和处理等方面的研究工作。在国际顶尖权威杂志 Memoirs of American Mathematical Society, Transaction of American Mathematical Society, Applied and Computational Harmonic Analysis, Advances in Computational Mathematics, IEEE Transaction on Information Theory, IEEE Transaction on Signal Processing, Journal of Fourier Analysis and Applications等发表论文100多篇，被引3000多次。先后担任Frontiers in Applied Mathematics and Statistics, Sampling Theory in Signal and Imaging Processing, Numerical Functional Analysis and Optimization, Advances in Computational Mathematics等期刊的编委。