Uncertainty product for Vilenkin groups. - Ivan Kovalyov; Elena A. Lebedeva (Int. J. Wavelets Multiresolution Inf. Process., 2018)

Two-dimensional moment problem and Schur algorithm. - Ivan Kovalyov; Stefan Kunis (CoRR, 2024)

Darboux transformation of symmetric Jacobi matrices and Toda lattices. - Ivan Kovalyov; Oleksandra Levina (Frontiers Appl. Math. Stat., 2024)