Periodic perturbations of unbounded Jacobi matrices II: Formulas for density. - Grzegorz Swiderski (J. Approx. Theory, 2017)

Periodic perturbations of unbounded Jacobi matrices I: Asymptotics of generalized eigenvectors. - Grzegorz Swiderski; Bartosz Trojan (J. Approx. Theory, 2017)

Periodic perturbations of unbounded Jacobi matrices III: The soft edge regime. - Grzegorz Swiderski (J. Approx. Theory, 2018)

Asymptotic behavior of Christoffel-Darboux kernel via three-term recurrence relation II. - Grzegorz Swiderski; Bartosz Trojan (J. Approx. Theory, 2021)

About essential spectra of unbounded Jacobi matrices. - Grzegorz Swiderski; Bartosz Trojan (J. Approx. Theory, 2022)

Christoffel functions for multiple orthogonal polynomials. - Grzegorz Swiderski; Walter Van Assche (J. Approx. Theory, 2022)

On positive Jacobi matrices with compact inverses. - Pavel Stovícek; Grzegorz Swiderski (J. Approx. Theory, 2026)