Abstract:Multigrid methods are among the most efficient iterative techniques for solving large-scale linear systems that arise from discretized partial differential equations. As a foundation for multigrid analysis, two-grid theory plays an important role in understanding and designing multigrid methods. Convergence analysis of exact two-grid methods (i.e., the Galerkin coarse-grid system is solved exactly) has been well developed: the convergence factor of exact two-grid methods can be characterized by an identity. Ho… Show more
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