Geometry Seminar

Date: November 14, 2019

Time: 4:00PM - 5:00PM

Location: BLOC 628

Speaker: M. Michalek, MPI Leipzig

Title: C^*-actions, ML-degree and various Grassmannians

Abstract: Central questions in many branches of mathematics are related to understanding the cohomology class of a graph of a Cremona transformation. One case is statistics, where the Maximum Likelihood degree of Gaussian models can be expressed exactly in this terms. I will report on work in progress with Wisniewski, where we upgrade the relevant Cremona transformation to a C^* action on a blow up of a homogeneous variety. This leads to a new computational approach towards the ML degree.