3 papers
math.NA2026
A note on the spectral distribution of non-Hermitian block matrices with Toeplitz blocks
Andrea Adriani, Giacomo Tento
In the present paper, we are concerned with the study of the spectral distribution of matrix-sequences showing a non-Hermitian block structure with Toeplitz blocks. We use the noti…
math.GM2026
Angles, orthogonality, and Pythagorean theorem in Banach spaces with two related applications
Antonio Cicone, Stefano Serra-Capizzano, Giacomo Tento +1
In the current work, we propose a generalization of angles and orthogonality from to generic Banach spaces, starting from a version of the Pythagorean theorem, $p\in [1…
math.NA2025
Determining the space dependent coefficients in space-time fractional diffusion equations via Krylov preconditioning
Asim Ilyas, Muhammad Faisal Khan, Rosita L. Sormani +2
We consider a time-space fractional diffusion equation with a variable coefficient and investigate the inverse problem of reconstructing the source term, after regularizing the pro…