The convergence rate of a multigrid method with Gauss-Seidel relaxation for the Poisson equation

Braess, Dietrich

doi:10.1090/S0025-5718-1984-0736449-6

The convergence rate of a multigrid method with Gauss-Seidel relaxation for the Poisson equation
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Math. Comp. 42 (1984), 505-519 Request permission

Abstract:

The convergence rate of a multigrid method for the numerical solution of the Poisson equation on a uniform grid is estimated. The results are independent of the shape of the domain as long as it is convex and polygonal. On the other hand, pollution effects become apparent when the domain contains reentrant corners. To estimate the smoothing of the Gauss-Seidel relaxation, the smoothness is measured by comparing the energy norm with a (weaker) discrete seminorm.

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