题目：Lacunary Fourier Series—Old and new stories

报告人：Tao Mei (Baylor University,  USA)

时间：10月17日，20:30-21:30 

地点：Zoom会议，会议号：916 1841 9254，密码：123456

摘要：The Lacunary Fourier Series  is a well-studied subject with several interesting properties in the classical analysis.  In this talk, I will first review these properties, especially the unconditionality of Lacunary series in the Lp spaces of the unit disc. I will then  explain an open question on the unconditionality of length-lacunary Fourier series on free group C* algebras and discuss the related problems and results.  Part of the talk is based on joint works with Chianyeong  Chuah, Yazhou Han and Zhenchuan  Liu.