Jiahong Wu
Afilliation: Oklahoma State University
Title: The surface quasi-geostrophic equation and its generalizations
Abstract: Fundamental issues such as the global regularity problem concerning the surface
quasi-geostrophic (SQG) and related equations have attracted a lot of attention
recently. Signicant progress has been made in the last few years. This talk
summarizes some current results on the critical and supercritical SQG equations
and presents very recent work on the generalized SQG equations. These generalized equations are active scalar equations with the velocity fields determined by the scalars through general Fourier multiplier operators. The SQG equation is a special case of these general models and it corresponds to the Riesz transform. We obtain global regularity for equations with velocity
fields logarithmically singular than the 2D Euler and local regularity for equations with velocity fields more singular than those corresponding to the Riesz transform. The results are from recent papers in collaboration with D. Chae and P. Constantin, and with D. Chae, P. Constantin, D. Cordoba and F. Gancedo.
Slides: WuJiahong.pdf
