Infinitesimal Hilbert 16th problem
יום ב', 20/04/2015 - 14:00
Prof. S. Yakovenko, Weizmann Institute
2nd floor Colloquium Room, Building 216
I will describe the current state of affairs in both the original Hilbert 16th problem
(on limit cycles of polynomial planar vector fields) and its relaxed version on zeros of
Abelian integrals. It turns out that the latter belong to a natural class of Q-functions
described by integrable systems of linear differential equations with quasiunipotent monodromy,
defined over the field of rational numbers. Functions of this class admit explicit (albeit very
excessive) bounds for the number of their isolated zeros in a way similar to algebraic functions.
This result lies at the core of the solution of the infinitesimal Hilbert problem, achieved with
Gal Binyamini and Dmitry Novikov.
The talk is aimed at a broad audience.