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Comparing multilevel coarsening strategies. (English) Zbl 1024.65120

Several multilevel coarsening strategies are compared by using stable subspace splitting techniques. The obtained condition numbers show how well the coarsening strategies are suited for solving an anisotropic elliptic boundary value problem.

MSC:

65N55 Multigrid methods; domain decomposition for boundary value problems involving PDEs
65N30 Finite element, Rayleigh-Ritz and Galerkin methods for boundary value problems involving PDEs
35J25 Boundary value problems for second-order elliptic equations
65F35 Numerical computation of matrix norms, conditioning, scaling
65F10 Iterative numerical methods for linear systems
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