报告主题：Linear ordinary differential and difference equations with apparent singularities

主 讲 人：OLEG CHALYKH 教授（英国利兹大学数学学院）

主 持 人：吴成发

时 间：2026年4月1日（三）15：30-16：30

地 点：致知楼706

嘉宾简介：

Oleg Chalykh obtained his P hD from Moscow State University in 1992, after wh ich he held positions at the Moscow State Universi ty, followed by visiting positions in the UK and the USA, before joining the School of Mathematics at the University of Leeds (UK) in 2004. His interests i nclude integrable systems, mathematical physics, representation theory, and special functions.

报告摘要：

For a linear ODE in the complex domain its singular point is called an apparent singularity i f all solutions are meromorphic near this point; eq uivalently, this is a regular singular point with trivia I local monodromy. What can one say about an eq uation if all of its finite singular points are apparen t singularities? I will first describe the answer in th e case of ODEs whose coefficients are rational fun ctions, bounded at infinity. I will then discuss an a nalogous problem for linear difference equations.