Cascading smoothers are sequences of single-step block-diagonal operators whose levels are chosen by Frobenius-norm minimization of successive error propagators and perform at or above classical smoothers on Poisson, interface, and Stokes problems.
Lottes,Optimal polynomial smoothers for multigrid V-cycles, Numerical Linear Algebra with Applications, 30 (2023), p
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Matching-based AMG preconditioners deliver robust and scalable performance for solving large ill-conditioned systems from IgA discretizations in parallel HPC settings.
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Cascading Smoothers for Multigrid
Cascading smoothers are sequences of single-step block-diagonal operators whose levels are chosen by Frobenius-norm minimization of successive error propagators and perform at or above classical smoothers on Poisson, interface, and Stokes problems.
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Parallel matching-based AMG preconditioners for elliptic equations discretized by IgA
Matching-based AMG preconditioners deliver robust and scalable performance for solving large ill-conditioned systems from IgA discretizations in parallel HPC settings.