Oleg Lisovyy (Université de Tours)


Title: Accessory parameters in Heun equations and classical conformal blocks.

Abstract: We will discuss accessory parameters of Floquet type in the Heun equation and some of its confluent versions. A conjecture by Zamolodchikov relates them to quasiclassical limit of conformal blocks of the Virasoro algebra. I will explain an extension of this conjectural relation to another class of accessory parameter functions that are defined by inverting all-order Bohr-Sommerfeld periods for the confluent and biconfluent Heun equation.

Seminar Physique Mathématique
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