Publications and preprints
V. Noferini, L. Nyman, F. Poloni. Nearest matrix with multiple eigenvalues by Riemannian optimization. [Preprint] arxiv.org/abs/2509.26344
V. Noferini, L. Nyman. Finding the nearest Omega-stable pencil with Riemannian optimization. Numer. Algor. (2025). https://doi.org/10.1007/s11075-025-02140-7
M. Gnazzo, V. Noferini, L. Nyman, F. Poloni. Riemann-Oracle: a general-purpose Riemannian optimizer to solve nearness problems in matrix theory. Found. Comput. Math., 2025. To appear.
F. Dopico, V. Noferini, L. Nyman. A Riemannian optimization method to compute the nearest singular pencil. SIAM J. Matrix Anal. Appl. 45(4), 2007--2038, 2024.
V. Noferini, L. Nyman, J. Pérez, M. C. Quintana. Perturbation theory of transfer function matrices. SIAM J. Matrix Anal. Appl. 44(3), 1299--1320, 2023.