Krylov methods for nonsymmetric linear systems

G Meurant, JD Tebbens - Cham: Springer, 2020 - Springer
Solving systems of algebraic linear equations is among the most frequent problems in
scientific computing. It appears in many areas like physics, engineering, chemistry, biology …

[BOOK][B] A Journey through the History of Numerical Linear Algebra

C Brezinski, G Meurant, M Redivo-Zaglia - 2022 - SIAM
A Journey through the History of Numerical Linear Algebra: Back Matter Page 1 Bibliography
[1] A. Abdelfattah, H. Anzt, A. Bouteiller, A. Danalis, JJ Dongarra, M. Gates, A. Haidar, J. Kurzak …

[PDF][PDF] Computing approximate (block) rational Krylov subspaces without explicit inversion with extensions to symmetric matrices

T Mach, MS Pranic, R Vandebril - Electron. Trans. Numer. Anal, 2014 - kurims.kyoto-u.ac.jp
It has been shown that approximate extended Krylov subspaces can be computed, under
certain assumptions, without any explicit inversion or system solves. Instead, the vectors …

Computation of generalized matrix functions with rational Krylov methods

A Casulli, I Simunec - Mathematics of Computation, 2023 - ams.org
We present a class of algorithms based on rational Krylov methods to compute the action of
a generalized matrix function on a vector. These algorithms incorporate existing methods …

[HTML][HTML] Inverse eigenvalue problems for extended Hessenberg and extended tridiagonal matrices

T Mach, M Van Barel, R Vandebril - Journal of Computational and Applied …, 2014 - Elsevier
In inverse eigenvalue problems one tries to reconstruct a matrix, satisfying some constraints,
given some spectral information. Here, two inverse eigenvalue problems are solved. First …

On deflations in extended QR algorithms

T Mach, R Vandebril - SIAM Journal on Matrix Analysis and Applications, 2014 - SIAM
In this paper we discuss the deflation criterion used in the extended QR algorithm based on
the chasing of rotations. We provide absolute and relative perturbation bounds for this …

Convergence rates for inverse-free rational approximation of matrix functions

C Jagels, T Mach, L Reichel, R Vandebril - Linear Algebra and its …, 2016 - Elsevier
This article deduces geometric convergence rates for approximating matrix functions via
inverse-free rational Krylov methods. In applications one frequently encounters matrix …

Gauss–Laurent-type quadrature rules for the approximation of functionals of a nonsymmetric matrix

J Alahmadi, H Alqahtani, MS Pranić, L Reichel - Numerical Algorithms, 2021 - Springer
This paper is concerned with the approximation of matrix functionals of the form w T f (A) v,
where A∈ ℝ n× n A∈R^n*n is a large nonsymmetric matrix, w, v∈ ℝ nw,v∈R^n, and f is a …

[PDF][PDF] Inverse eigenvalue problems linked to rational Arnoldi, and rational,(non) symmetric Lanczos

T Mach, M Van Barel, R Vandebril - TW Reports, 2013 - lirias.kuleuven.be
Two inverse eigenvalue problems are discussed. First, given the eigenvalues and a weight
vector an extended Hessenberg matrix is computed. This matrix represents the recurrences …

An extended Hamiltonian QR algorithm

M Ferranti, B Iannazzo, T Mach, R Vandebril - Calcolo, 2017 - Springer
An extended QR algorithm specifically tailored for Hamiltonian matrices is presented. The
algorithm generalizes the customary Hamiltonian QR algorithm with additional freedom in …