Seminars and Colloquia by Series

TBA by Walton Green

Series
Analysis Seminar
Time
Wednesday, April 15, 2026 - 14:00 for 1 hour (actually 50 minutes)
Location
Skiles 005
Speaker
Walton Green – Illinois State University

Real bordered Floer homology

Series
Geometry Topology Seminar
Time
Monday, April 13, 2026 - 14:00 for 1 hour (actually 50 minutes)
Location
Skiles 006
Speaker
Robert Lipshitz – University of Oregon –

Real Heegaard Floer homology is a new invariant of branched double covers, introduced by Gary Guth and Ciprian Manolescu, and inspired by work of Jiakai Li and others in Seiberg-Witten theory. After sketching their construction, we will describe an extension of the "hat" variant to 3-manifolds with boundary, and the algorithm this gives to compute it when the fixed set is connected. We will end with some open questions.

TBA by Maddie Brandt

Series
Algebra Seminar
Time
Monday, April 13, 2026 - 13:00 for 1 hour (actually 50 minutes)
Location
Skiles 005
Speaker
Maddie Brandt – Vanderbilt University

Please Note: There will be a pre-seminar.

TBA

ML degrees of Brownian motion tree models: Star trees and root invariance

Series
Algebra Seminar
Time
Monday, April 6, 2026 - 13:00 for 1 hour (actually 50 minutes)
Location
Skiles 005
Speaker
Ikenna Nometa – Georgia Institute of Technology

A Brownian motion tree (BMT) model is a Gaussian model whose associated set of covariance matrices is linearly constrained according to common ancestry in a phylogenetic tree. This talk will discuss the complexity of inferring the maximum likelihood (ML) estimator for a BMT model by computing its ML-degree.  The talk will highlight an explicit formula for the ML-degree of the BMT model on a star tree. We will also show that the ML-degree of a BMT model is independent of the choice of the root. This talk is based on work (doi.org/10.1016/j.jsc.2025.102482) with J. I. Coon, S. Cox, & A. Maraj.

TBD

Series
Number Theory
Time
Wednesday, April 1, 2026 - 15:30 for 1 hour (actually 50 minutes)
Location
Skiles 006
Speaker
Jesse Thorner – University of Illinois Urbana-Champaign –

TBD

Pages