hecmw_precond_SAAMG_prolongation.F90 File Reference

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Modules
module	hecmw_precond_saamg_prolongation
	Smoothed Aggregation AMG preconditioner : prolongation.

Functions/Subroutines
subroutine, public	hecmw_precond_saamg_prolongation::hecmw_saamg_tentative (bfine, n, m, nb, aggr, naggr, phat, bcoarse)
	Build P-hat (n x naggr*m block-CSR) and B_coarse (naggr*m x m) from B_fine. More...
subroutine, public	hecmw_precond_saamg_prolongation::hecmw_saamg_smooth_prolongator (A, D, omega, phat, p)
	Smoothed prolongator P = P-hat - omega * D^{-1} (A P-hat), via SpGEMM. Computes A*P-hat once as a sparse product (instead of one full A-matvec per coarse column, which is O(ncoarse * nnz_A)), applies the block-diagonal D^{-1} row-wise, then forms the sparse difference by summing triplets. More...