Multigrid with inexact minimal residual smoothing acceleration
Some inexact minimal residual smoothing (IMRS) techniques to accelerate the standard multigrid convergence are introduced. The IMRS acceleration schemes minimize the residual norm of the multigrid iterate in a subspace and reduce the cost of the standard MRS acceleration by about 40\%. Numerical experiments are employed to compare exact and inexact minimal residual smoothings.
scientific article; zbMATH DE number 1076511
scientific article