题目：Drift diffusion equations with fractional diffusion and the quasi-geostrophic equation.

报告时间： 4月28日下午: 2:00--5:00 (星期三)

报告时间： 4月30日下午: 2:00--5:00 (星期五)

报告时间： 5月5日下午: 2:00--5:00 (星期三)

报告时间： 5月7日下午: 2:00--5:00 (星期五)

报告人：　北京师范大学, 许孝精副教授

论文摘要：Motivated by the critical dissipative quasi-geostrophic equation, they prove that drift-Diffusion equations with L^2 initial data and minimal assumptions on the drift are locally Holder continuous. As an application they show that solutions of the quasi-geostrophic equation with initial L^2 data and critical diffusion (?Delta)^{1/2}, are locally smooth for any space dimension.