Prof. Andreas Seeger (University of Wisconsin, Madison)
Maximal operators for spherical means have long played a prominent role in harmonic analysis, beginning with the classical theorems by Stein and Bourgain. In this colloquium we discuss old and new results for variants with restricted dilation sets, and some open problems. The known results depend on various notions of fractal dimension of the dilation set or subsets of it.
Meeting ID: 943 7403 6747