[LIBRO][B] Multilevel block factorization preconditioners: Matrix-based analysis and algorithms for solving finite element equations

PS Vassilevski - 2008 - books.google.com
This monograph is the first to provide a comprehensive, self-contained and rigorous
presentation of some of the most powerful preconditioning methods for solving finite element …

Recursive Krylov‐based multigrid cycles

Y Notay, PS Vassilevski - Numerical Linear Algebra with …, 2008 - Wiley Online Library
We consider multigrid (MG) cycles based on the recursive use of a two‐grid method, in
which the coarse‐grid system is solved by µ⩾ 1 steps of a Krylov subspace iterative method …

Multiscale finite-element method for linear elastic geomechanics

N Castelletto, H Hajibeygi, HA Tchelepi - Journal of Computational Physics, 2017 - Elsevier
The demand for accurate and efficient simulation of geomechanical effects is widely
increasing in the geoscience community. High resolution characterizations of the …

Preconditioning of boundary value problems using elementwise Schur complements

O Axelsson, R Blaheta, M Neytcheva - SIAM Journal on Matrix Analysis and …, 2009 - SIAM
This paper deals with an efficient technique for computing high-quality approximations of
Schur complement matrices to be used in various preconditioners for the iterative solution of …

Nonsymmetric preconditioning for conjugate gradient and steepest descent methods

H Bouwmeester, A Dougherty, AV Knyazev - Procedia Computer Science, 2015 - Elsevier
We analyze a possibility of turning off post-smoothing (relaxation) in geometric multigrid
when used as a preconditioner in preconditioned conjugate gradient (PCG) linear and …

A reduced order model‐based preconditioner for the efficient solution of transient diffusion equations

D Pasetto, M Ferronato, M Putti - International Journal for …, 2017 - Wiley Online Library
This paper presents a novel class of preconditioners for the iterative solution of the
sequence of symmetric positive‐definite linear systems arising from the numerical …

Nonuniformly weighted Schwarz smoothers for spectral element multigrid

J Stiller - Journal of Scientific Computing, 2017 - Springer
A hybrid Schwarz/multigrid method for spectral element solvers to the Poisson equation in
R^ 2 R 2 is presented. It extends the additive Schwarz method studied by Lottes and Fischer …

Gem–a platform for advanced mathematical geosimulations

R Blaheta, O Jakl, R Kohut, J Starý - … . Revised Selected Papers, Part I 8, 2010 - Springer
The contribution deals with the development of a 3-D finite-element package called GEM
and its aspirations in demanding mathematical modelling and simulations arising in …

Krylov improvements of the Uzawa method for Stokes type operator matrices

O Axelsson, J Karátson - Numerische Mathematik, 2021 - Springer
The paper is devoted to Krylov type modifications of the Uzawa method on the operator level
for the Stokes problem in order to accelerate convergence. First block preconditioners and …

Space decomposition preconditioners and parallel solvers

R Blaheta - … and Advanced Applications: Proceedings of ENUMATH …, 2004 - Springer
This paper uses the general framework of space decomposition—subspace correction for
providing an overview of Schwarz-type preconditioners. The considered preconditioners are …