On $q$-Isomonodromic Deformations and $q$-Nekrasov Functions

Abstract

We construct a fundamental system of a $q$-difference Lax pair of rank $N$ in terms of 5d Nekrasov functions with $q=t$. Our fundamental system degenerates by the limit $q\to 1$ to a fundamental system of a differential Lax pair, which yields the Fuji-Suzuki-Tsuda system. We introduce tau functions of our system as Fourier transforms of 5d Nekrasov functions. Using asymptotic expansions of the fundamental system at $0$ and $\infty$, we obtain several determinantal identities of the tau functions.

References in corpus (5)

• Dispersive estimates for Schrodinger operators in dimensions one and three
• CFT approach to the $q$-Painlevé VI equation
• Drinfeld-Sokolov hierarchies of type A and fourth order Painleve systems
• A Variation of the $q$-Painlevé System with Affine Weyl Group Symmetry of Type $E_7^{(1)}$
• Affine Weyl group symmetry of the Garnier system