Calendar

Feb
1
Thu
Phylogenetic algebraic geometry seminar
Feb 1 @ 4:00 pm – 5:00 pm
Feb
5
Mon
Colloquium: David Stapleton
Feb 5 @ 3:30 pm – 4:30 pm
Feb
22
Thu
Undergraduate Math Club: Kamuela Yong (University of Hawaii, West Oahu) @ Keller 301
Feb 22 @ 4:30 pm – 5:30 pm

Title: modeling diseases 
Abstract: We will talk about my journey into mathematics and learn how to use math to model the spread of diseases.

Feb
28
Wed
Applied math seminar: Shelby Cox (University of Michigan) @ Keller 303
Feb 28 @ 3:30 pm – 4:30 pm

Title: Maximum Likelihood Degree of Brownian motion tree models

Abstract: A Brownian motion tree model is a Gaussian model whose associated set of covariance matrices is linearly constrained according to common ancestry in a phylogenetic tree. In joint work with Jane Coons, Aida Maraj, and Ikenna Nometa, we study the complexity of inferring the maximum likelihood (ML) estimator for a Brownian motion tree model by computing its ML-degree. Our main result is that the ML-degree of the BMT model on a star tree with n + 1 leaves is 2^(n+1) – 2n – 3, which was previously conjectured by Amendola and Zwiernik. We also prove that the ML-degree of a Brownian motion tree model is independent of the choice of root and we find a combinatorial formula for the likelihood function. In this talk, I will introduce Brownian motion tree models and the tools from computational algebraic geometry that we use to compute the ML-degree.

Mar
6
Wed
Applied math seminar: Shilpa Khatri (UC Merced) @ Keller 303
Mar 6 @ 3:30 pm – 4:30 pm
May
1
Wed
Last day of instruction
May 1 all-day
Jul
20
Sat
Algebraic Methods in Phylogenetics Workshop
Jul 20 – Jul 24 all-day