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20012025
most citedHow instanton combinatorics solves Painlevé VI, V and III's

102 citations · 857 across the 31 of their papers we have counts for

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math-ph2025

Many-faced Painlevé I: irregular conformal blocks, topological recursion, and holomorphic anomaly approaches

Nikolai Iorgov, Kohei Iwaki, Oleg Lisovyy +1

In recent years, the Fourier series (Zak transform) structure of the Painlevé I tau function has emerged in multiple contexts. Its main building block admits several conjectural in…

math-ph2022★ 39 cited

Perturbative connection formulas for Heun equations

O. Lisovyy, A. Naidiuk

Connection formulas relating Frobenius solutions of linear ODEs at different Fuchsian singular points can be expressed in terms of the large order asymptotics of the corresponding…

math-ph2021★ 22 cited

Accessory parameters in confluent Heun equations and classical irregular conformal blocks

O. Lisovyy, A. Naidiuk

Classical Virasoro conformal blocks are believed to be directly related to accessory parameters of Floquet type in the Heun equation and some of its confluent versions. We extend t…

math-ph2019★ 7 cited

On self-similar solutions of the vortex filament equation

O. Gamayun, O. Lisovyy

We study self-similar solutions of the binormal curvature flow which governs the evolution of vortex filaments and is equivalent to the Landau-Lifshitz equation. The corresponding…

math-ph2018★ 47 cited

Irregular conformal blocks and connection formulae for Painlevé V functions

O. Lisovyy, H. Nagoya, J. Roussillon

We prove a Fredholm determinant and short-distance series representation of the Painlevé V tau function associated to generic monodromy data. Using a relation of to t…

math-ph2018★ 8 cited

On solutions of the Fuji-Suzuki-Tsuda system

Pavlo Gavrylenko, Nikolai Iorgov, Oleg Lisovyy

We derive Fredholm determinant and series representation of the tau function of the Fuji-Suzuki-Tsuda system and its multivariate extension, thereby generalizing to higher rank the…