Seminars and colloquia

E.g., Feb 29, 2024

Shaoming Guo

UW Madison
The dichotomy of Nikodym sets and local smoothing estimates

March 6, 2024 - 3:00 pm

MATX 1118

The talk is about local smoothing estimates for linear wave equations and the existence of Nikodym sets. We will see that they form a dichotomy: Local smoothing estimates hold if and only if Nikodym sets do not exist. Read more
  • Harmonic Analysis and Fractal Geometry

Alan Chang

Washington University in St. Louis
TBA (Alan Chang)

March 11, 2024 - 3:00 pm

ESB 4133 (PIMS library)

  • Harmonic Analysis and Fractal Geometry

Junjie Zhu

University of British Columbia
UBC-HAFG Seminar: Cones are not Salem

March 18, 2024 - 3:00 pm to 4:00 pm

ESB 4133 (PIMS Library)

The notions of Hausdorff and Fourier dimensions are ubiquitous in harmonic analysis and geometric measure theory. It is known that any hypersurface in $\mathbb{R}^{d+1}$ has Hausdorff dimension $d$. However, the Fourier dimension depends on the finer geometric properties of ... Read more
  • Harmonic Analysis and Fractal Geometry

Kyle Yip

University of British Columbia
UBC HAFG Seminar: Erdős similarity problem in the large

March 25, 2024 - 3:00 pm to 4:00 pm

ESB 4133 (PIMS Library)

The celebrated Erdős similarity problem asks if it is always possible to construct a set of positive Lebesgue measure that does not contain any (nontrivial) affine copy of a given infinite set. The problem remains widely open. In this talk, I will discuss an analogue of Erdős ... Read more
  • Harmonic Analysis and Fractal Geometry