In this work, we are interested in solving large linear systems stemming from the extra–
membrane–intra model, which is employed for simulating excitable tissues at a cellular …

In this work, we propose a novel preconditioned Krylov subspace method for solving an
optimal control problem of wave equations, after explicitly identifying the asymptotic spectral …

Motivated by the recent work (Donatelli et al. Electron. Trans. Numer. Anal. 59, 157-178
2023) on a preconditioned MINRES for flipped linear systems in imaging with Dirichlet …

Let $\{\Lambda_n=\{\lambda_ {1, n},\ldots,\lambda_ {d_n, n}\}\} _n $ be a sequence of finite
multisets of real numbers such that $ d_n\to\infty $ as $ n\to\infty $, and let …

In the present study, we consider the Extra-Membrane-Intra model (EMI) for the simulation of
excitable tissues at the cellular level. We provide the (possibly large) system of partial …

Given a compact linear operator K, the (pseudo) inverse K^\dagger is usually substituted by
a family of regularizing operators R_α which depends on K itself. Naturally, in the actual …

Sequences of structured matrices of increasing size, such as generalized locally Toeplitz
sequences, arise in many scientific applications and especially in the numerical …

The graphon is a powerful framework for modeling large-scale networks, but its estimation
remains a significant challenge. In this paper, we propose a novel approach that directly …

A powerful tool for analyzing and approximating the singular values and eigenvalues of
structured matrices is the theory of Generalized Locally Toeplitz (GLT) sequences. By the …

Motivated by a recent work on a preconditioned MINRES for flipped linear systems in
imaging, in this note we extend the scope of that research for including more precise …