Posted February 3, 2025
Informal Geometry and Topology Seminar Questions or comments?
1:30 pm
Peter Ramsey, Louisiana State University
TBD
Posted March 21, 2025
Probability Seminar Questions or comments?
3:30 pm – 4:30 pm Lockett 237
Barbara Rüdiger, Bergische Universität Wuppertal, Germany
Identification and existence of Boltzmann processes
A stochastic differential equation of the McKean-Vlasov type is identified such that its Fokker-Planck equation coincides with the Boltzmann equation. Its solutions are called Boltzmann processes. They describe the dynamics (in position and velocity) of particles expanding in vacuum in accordance with the Boltzmann equation. Given a good solution of the Boltzmann equation, the existence of solutions to the McKean-Vlasov SDE is established for the hard sphere case. This is a joint work with P. Sundar.
Posted March 21, 2025
Control and Optimization Seminar Questions or comments?
9:30 am – 10:20 am Note the Special Earlier Seminar Time For Only This Week. This is a Zoom Seminar. Zoom (click here to join)
Denis Dochain, Université Catholique de Louvain
IEEE Fellow, IFAC Fellow
TBA
Posted March 21, 2025
Combinatorics Seminar Questions or comments?
11:30 am – 12:30 pm Zoom Link
Jorn van der Pol, University of Twente
Turán densities for matroid basis hypergraph
What is the maximum number of bases of an n-element, rank-r matroid without a given uniform matroid U as a minor? This question arises in the problem of determining the Turán density of daisy-hypergraphs. Ellis, Ivan, and Leader recently showed that this density is positive, thus disproving a conjecture by Bollobás, Leader, and Malvenuto. Their construction is a matroid basis hypergraph, and we show that their construction is best-possible within the class of matroid basis hypergraphs. This is joint work with Zach Walsh and Michael C. Wigal.