Seminars and colloquia

E.g., Mar 1, 2024

Giuseppe Genovese

University of Zürich
Landscape complexity, random determinants and spin glasses

March 1, 2024 - 12:00 pm to 1:00 pm

(online talk)

An important object in the study of high-dimensional non-convexf unctions is the so-called complexity, defined as the logarithm of the number of critical points. For random functions, this ist ypically obtained by the Kac-Rice formula, which requires in particular the ... Read more

SEGISMUNDO IZQUIERDO

Universidad de Valladolid
Repeated games with endogenous separation

March 1, 2024 - 3:00 pm to 4:00 pm

ESB 1012 (PIMS building)

A game represents an interaction in which a group of players make individual choices and receive individual payoffs that depend on the aggregate set of choices. We consider indefinitely repeated games with endogenous separation (meaning that players can dissolve their current ... Read more

Danny Ofek

UBC
Essential dimension of cohomology classes via valuation theory

March 4, 2024 - 3:00 pm

MATH 126

Informally speaking, the essential dimension of an algebraic object is the minimal number of independent parameters needed to define it. We will explain how valuations can be used to prove lower bounds on the essential dimension of Galois cohomology classes of a field (with an ... Read more
  • Algebra and Algebraic geometry

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

Mathav Murugan

UBC
Boundary trace of reflected diffusions

March 6, 2024 - 3:15 pm to 4:15 pm

ESB 4127

Spitzer (1958) showed that the trace of reflected Brownian motion on the upper half space on its boundary is a Cauchy process. More generally, every symmetric stable process in n-dimensional Euclidean space can be obtained as a trace process of a diffusion in the (n+1)- ... Read more
  • Probability

David Popović

UCLA
TBA

March 6, 2024 - 4:00 pm

ESB 4133 (PIMS lounge)

  • Topology

Michael Bennett

UBC
Arithmetic progressions in sumsets of geometric progressions

March 7, 2024 - 2:00 pm

ESB 4133

If A and B are two geometric progressions, we characterize all 3-term arithmetic progressions in the sumset A+B. Somewhat surprisingly, while mostly elementary, this appears to require quite deep machinery from Diophantine Approximation. Read more
  • Number Theory

Balazs Elek

UBC
AG talk by Balazs Elek

March 11, 2024 - 3:00 pm

MATH 126

  • Algebra and Algebraic 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

Simone Coccia

UBC
Mar 14 TBA

March 14, 2024 - 2:00 pm

ESB 4133

  • Number Theory