Rostyslav Kozhan
Senior Lecturer/Associate Professor at Department of Mathematics; Analysis and Partial Differential Equations
- Telephone:
- +46 18 471 32 59
- E-mail:
- rostyslav.kozhan@math.uu.se
- Visiting address:
- Ångströmlaboratoriet, Regementsvägen 10
- Postal address:
- Box 480
751 06 UPPSALA
Senior Lecturer/Associate Professor at Department of Mathematics; Academic staff
- Telephone:
- +46 18 471 32 59
- E-mail:
- rostyslav.kozhan@math.uu.se
- Visiting address:
- Ångströmlaboratoriet, Regementsvägen 10
- Postal address:
- Box 480
751 06 UPPSALA
Download contact information for Rostyslav Kozhan at Department of Mathematics; Academic staff
Short presentation
Check my webpage for an up-to-date information
My research is focused around Spectral Theory, Theory of Orthogonal Polynomials, and Random Matrix Theory

Publications
Selection of publications
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Christoffel transform and multiple orthogonal polynomials
Part of Journal of Computational and Applied Mathematics, 2026
- DOI for Christoffel transform and multiple orthogonal polynomials
- Download full text (pdf) of Christoffel transform and multiple orthogonal polynomials
-
Szego recurrence for multiple orthogonal polynomials on the unit circle
Part of Proceedings of the American Mathematical Society, p. 2983-2997, 2024
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Global fluctuations for Multiple Orthogonal Polynomial Ensembles
Part of Journal of Functional Analysis, 2021
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Relative Szego Asymptotics for Toeplitz Determinants
Part of International mathematics research notices, p. 5441-5496, 2019
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Rank One Non-Hermitian Perturbations of Hermitian β-Ensembles of Random Matrices
Part of Journal of statistical physics, p. 92-108, 2017
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Part of Communications in Mathematical Physics, p. 991-1027, 2017
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Finite range perturbations of finite gap Jacobi and CMV operators
Part of Advances in Mathematics, p. 204-226, 2016
Recent publications
-
Christoffel transform and multiple orthogonal polynomials
Part of Journal of Computational and Applied Mathematics, 2026
- DOI for Christoffel transform and multiple orthogonal polynomials
- Download full text (pdf) of Christoffel transform and multiple orthogonal polynomials
-
Zeros of multiple orthogonal polynomials: location and interlacing
Part of Bulletin of the London Mathematical Society, 2026
- DOI for Zeros of multiple orthogonal polynomials: location and interlacing
- Download full text (pdf) of Zeros of multiple orthogonal polynomials: location and interlacing
-
Multiplicative non-Hermitian perturbations of classical β-ensembles
Part of Random Matrices. Theory and Applications, 2025
-
Szego recurrence for multiple orthogonal polynomials on the unit circle
Part of Proceedings of the American Mathematical Society, p. 2983-2997, 2024
-
A generalized Hermite-Biehler theorem and non-Hermitian perturbations of Jacobi matrices
Part of Journal of Mathematical Analysis and Applications, 2024
- DOI for A generalized Hermite-Biehler theorem and non-Hermitian perturbations of Jacobi matrices
- Download full text (pdf) of A generalized Hermite-Biehler theorem and non-Hermitian perturbations of Jacobi matrices
All publications
Articles in journal
-
Christoffel transform and multiple orthogonal polynomials
Part of Journal of Computational and Applied Mathematics, 2026
- DOI for Christoffel transform and multiple orthogonal polynomials
- Download full text (pdf) of Christoffel transform and multiple orthogonal polynomials
-
Zeros of multiple orthogonal polynomials: location and interlacing
Part of Bulletin of the London Mathematical Society, 2026
- DOI for Zeros of multiple orthogonal polynomials: location and interlacing
- Download full text (pdf) of Zeros of multiple orthogonal polynomials: location and interlacing
-
Multiplicative non-Hermitian perturbations of classical β-ensembles
Part of Random Matrices. Theory and Applications, 2025
-
Szego recurrence for multiple orthogonal polynomials on the unit circle
Part of Proceedings of the American Mathematical Society, p. 2983-2997, 2024
-
A generalized Hermite-Biehler theorem and non-Hermitian perturbations of Jacobi matrices
Part of Journal of Mathematical Analysis and Applications, 2024
- DOI for A generalized Hermite-Biehler theorem and non-Hermitian perturbations of Jacobi matrices
- Download full text (pdf) of A generalized Hermite-Biehler theorem and non-Hermitian perturbations of Jacobi matrices
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Correction to: Jost Asymptotics for Matrix Orthogonal Polynomials on the Real Line
Part of Constructive approximation, p. 545-549, 2023
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Hermitian and non-Hermitian perturbations of chiral Gaussian beta-ensembles
Part of Journal of Mathematical Physics, 2022
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Global fluctuations for Multiple Orthogonal Polynomial Ensembles
Part of Journal of Functional Analysis, 2021
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Part of Journal of Approximation Theory, 2020
-
Relative Szego Asymptotics for Toeplitz Determinants
Part of International mathematics research notices, p. 5441-5496, 2019
-
Rank One Non-Hermitian Perturbations of Hermitian β-Ensembles of Random Matrices
Part of Journal of statistical physics, p. 92-108, 2017
-
Part of Communications in Mathematical Physics, p. 991-1027, 2017
-
Finite range perturbations of finite gap Jacobi and CMV operators
Part of Advances in Mathematics, p. 204-226, 2016
-
Meromorphic Continuations of Finite Gap Herglotz Functions and Periodic Jacobi Matrices
Part of Communications in Mathematical Physics, p. 921-950, 2014
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Jost Asymptotics for Matrix Orthogonal Polynomials on the Real Line
Part of Constructive approximation, p. 267-309, 2012
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Equivalence classes of block Jacobi matrices
Part of Proceedings of the American Mathematical Society, p. 799-799, 2011
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Szegő asymptotics for matrix-valued measures with countably many bound states
Part of Journal of Approximation Theory, p. 1211-1224, 2010
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L 1-spectrum of Banach space valued Ornstein–Uhlenbeck operators
Part of Semigroup Forum, p. 547-553, 2008
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Asymptotics of the eigenvalues of two-diagonal Jacobi matrices
Part of Mathematical notes of the Academy of Sciences of the USSR, p. 283-287, 2005
Chapters in book
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On Gaussian random matrices coupled to the discrete Laplacian
Part of Analysis as a Tool in Mathematical Physics, p. 434-447, Birkhäuser Verlag, 2020