A policy iteration algorithm for the American put option and free boundary control problems. - Evangelos F. Magirou; Paraskevas Vassalos; Nikolaos Barakitis (J. Comput. Appl. Math., 2020)

Asymptotic spectra of large matrices coming from the symmetrization of Toeplitz structure functions and applications to preconditioning. - Paola Ferrari; Nikos Barakitis; Stefano Serra-Capizzano (Numer. Linear Algebra Appl., 2021)

On a Boundary Updating Method for the Scalar Stefan Problem. - Evangelos F. Magirou; Paraskevas Vassalos; Nikolaos Barakitis (CoRR, 2022)

Spectral Analysis and Preconditioned Iterative Solvers for Large Structured Linear Systems. - Nikos Barakitis (CoRR, 2022)

Preconditioners for fractional diffusion equations based on the spectral symbol. - Nikos Barakitis; Sven-Erik Ekström; Paris Vassalos (Numer. Linear Algebra Appl., 2022)

A note on eigenvalues and singular values of variable Toeplitz matrices and matrix-sequences, with application to variable two-step BDF approximations to parabolic equations. - Nikos Barakitis; Valerio Loi; Stefano Serra-Capizzano (CoRR, 2024)

Blocking structures, approximation, and preconditioning. - Nikos Barakitis; Marco Donatelli; Samuele Ferri; Valerio Loi; Stefano Serra-Capizzano; Rosita Luisa Sormani (CoRR, 2025)