Seminars and colloquia

E.g., Jan. 29, 2022

Antonio Alfieri

Heegaard Floer invariants of webs, two components links, and strongly invertible knots.

January 28, 2022

I will outline the construction of numerical invariants of embedded webs based on Heegaard Floer homology. This is motivated by some questions regarding the four-dimensional topology of strongly invertible knots, embedded theta-shaped graphs, and linking number zero two- ... Read more
  • Topology

Cihan Okay

Bilkent University
Simplicial techniques in quantum foundations

February 2, 2022

ESB 4133

Probability distributions produced by quantum measurements are more general than the ones produced by classical measurements. This is due to the fact that only commuting observables, for example represented by a set of commuting unitaries, can be simultaneously measured. ... Read more
  • Topology

Neha Malik

Indian Institute of Science Education and Research
Stiefel-Whitney Classes of Representations of Some Finite Groups of Lie Type

February 9, 2022

Orthogonal representations $\pi$ of a finite group $G$ have invariants $w_i(\pi)$ living in the $i$th degree cohomology group $H^i(G,Z/2Z)$, called Stiefel-Whitney Classes (SWCs). The sum $w(\pi)=1+w_1(\pi)+w_2(\pi)+\dots$ is called the total SWC of $\pi$. It seems there are ... Read more
  • Topology

Toni Annala

Topology Seminar - TBA

February 16, 2022

  • Topology

Jim Bryan

Topology Seminar - TBA

February 23, 2022

  • Topology

Peter Kropholler

University of Southampton

March 28, 2022

  • Topology