KWIM: Exponential varieties, statistical manifolds and Frobenius structures

Time
Friday, 19. November 2021
13:30 - 15:00

Location
online

Organizer
Gabriela Michalek

Speaker:
Noémie Combe

This event is part of an event series „Konstanz Women in Mathematics“.

We consider a class of manifolds corresponding to statistical models, related to exponential families. Exponential manifolds have been considered from the point of view of information geometry and independently real algebraic geometry. However, investigations on this object have evolved independently on both sides, creating a certain gap. The aim is to try to unify both approaches, by first establishing a dictionary between them. Secondly we connect them by introducing our web algebraization theorem, for the case of Frobenius statistical manifolds. This theorem relies on the theory of three-webs, introduced and developed by Blaschke and Cartan. We prove that the 3-webs of Frobenius exponential manifolds are algebraizable, i.e. that the r-dimensional foliations of the web belong to a hypercubic, answering an open question of Amari.