The Black-Box Multigrid Method
In this chapter, we describe the black-box multigrid (BBMG) method for the numerical solution of structured linear systems with a 9-point stencil. This matrix-based multigrid method is suitable for diffusion problems with variable and even discontinuous coefficients, even when the discontinuity lines don’t align with the coarse grid. Furthermore, we show how it can be modified to solve efficiently diffusion problems with strong-diffusion areas that interact with each other.
KeywordsStrong Coupling Boundary Point Coarse Grid Multigrid Method Junction Point
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