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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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.