天元讲堂（9.7） Almost reducibility in quasi periodic dynamics.
报告题目： Almost reducibility in quasi periodic dynamics.
报告人 Raphaël Krikorian（Université de Cergy-Pontoise)
报告人 Raphaël Krikorian（Université de Cergy-Pontoise)
报告摘要 A dynamics (for example a smooth circle diffeomorphism) is said to be almost reducible if after a change of coordinates it can be brought arbitrarily close to a simple model dynamics ( for example a rigid translation on the circle). I will discuss recent results obtained with Artur Avila on almost reducibility of smooth circle diffeomorhisms and smooth pseudo rotations of the disk
报告人简介：Krikorian教授为法国著名数学家，曾经多次在顶级数学期刊Ann. Math., Invent. Math.等期刊发表学术论文。他也是2018年ICM的受邀报告人。