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Multigrid smoothers for saddle point systems / eingereicht von Lisa Claus, M. Sc. Wuppertal, Juni 2019
Inhalt
Acknowledgments
Contents
Introduction
Partial differential equations
Definition and classification of partial differential equations
Systems of PDEs
Boundary conditions
Discretization methods
Finite difference method
Finite element method
Classification of the linear systems arising from systems of PDEs
Multigrid methods
Basic iterative methods
Geometric multigrid methods
Stationary iterative methods
Two-grid methods
Multigrid methods
Local Fourier analysis
Terminology
Smoothing analysis
Two-grid analysis
Practical guidelines
Classical Algebraic multigrid methods
Terminology
Algebraic smoothness
Classical AMG
New class of algebraic multigrid methods
Parallel multigrid methods
Construction of geometric multigrid smoothers for the Stokes equations
The Stokes equations
Multigrid components for the Stokes equations on staggered grids
Transfer operators
Relaxation methods
The Triad smoother
Computational work
LFA for the Stokes equations
Terminology
Vanka smoother
Triad smoother
Two-grid analysis
Numerical results
Algorithm development
Automatic construction of algebraic multigrid smoothers
Model problem - Maxwell's equations
The difficulty of Maxwell's equations
Geometric multigrid methods for Maxwell's equations
Automatic construction of AMG smoothers
Automatic construction of sets
Automatic construction of smoothers
Evaluating the smoothers
Fourier mode study
Ideal interpolation operator
Optimal interpolation operator
Constructing an interpolation operator
Conclusions & Outlook
List of Figures
List of Tables
List of Notations
Bibliography