Logarithmic Painlevé functions and Mathieu stability chart

Jun 28, 2021, 3:00 PM
40m
Chair: Marco Bertola

Chair: Marco Bertola

Speaker

Prof. Oleg Lisovyi (LMPT, Tours University)

Description

The tau function of Painlevé III_3 equation (parameterless PIII) corresponding to generic monodromy data is known to coincide with the dual Nekrasov-Okounkov partition function and admits explicit combinatorial series representation. I will explain how to derive an analog of this representation for the one-parameter family of non-generic solutions of Painlevé III_3 characterized by the logarithmic asymptotics. I will also discuss a connection between such logarithmic tau functions and the characteristic values of Mathieu equation describing the band structure of the Schroedinger operator with a cosine potential.

Primary author

Prof. Oleg Lisovyi (LMPT, Tours University)

Presentation materials