Abstract for the talk on 17.05.2022 (15:00 h)

Arbeitsgemeinschaft ANGEWANDTE ANALYSIS

Konstantin Kalinin (St. Petersburg State University)
Geometry of isomonodromic deformations and other directions of my scientific activity
17.05.2022, 15:00 h, only video broadcast

Let us consider a linear system on the Riemann sphere and assume that the coefficients of the system additionally depend on some parameter t (time). The following question is interesting: what can one say about the dependence of the coefficients on t, if monodromy is fixed? For a system with only simple poles, deformation equations have a very rich geometrical structure: it is a Hamiltonian system on a Lie algebra and the simplest non-trivial case corresponds to Painlevé VI equation. I am going to talk about the simplest non-trivial case of a system with an irregular singular point. This system has the same structure and leads to Painlevé V equation.

 

18.05.2022, 00:08