Week of Events
Analysis seminar: Xiumin Du (Northwestern)
Title: Weighted Fourier Extension EstimatesAbstract: In this talk, we will survey recent results on weighted Fourier extension estimates and its variants. Such estimates ask for L^2 bounds of the Fourier extension operator on $alpha$-dimensional sets, and they have applications to several problems in PDEs and geometric measure theory, including size of divergence set of Schrodinger […]
Topology Seminar: Joshua Swanson (University of Southern California)
Title: Webs, pockets, and buildingsAbstract: Kuperberg’s SL(3) non-elliptic web basis consists of certain trivalent planar graphs. Fontaine--Kamnitzer--Kuperberg showed that their duals may be realized as subcomplexes of a corresponding rank 2 affine building. The result is a collection of CAT(0) triangulated surfaces related to the geometric Satake correspondence. Recently, an SL(4) web basis was introduced […]