petsc-3.14.6 2021-03-30

PCGAMGSetReuseInterpolation

Reuse prolongation when rebuilding algebraic multigrid preconditioner

Synopsis

#include "petscpc.h" 
#include "petscksp.h" 
PetscErrorCode PCGAMGSetReuseInterpolation(PC pc, PetscBool n)

Collective on PC

Input Parameters

	pc	- the preconditioner context
	n	- PETSC_TRUE or PETSC_FALSE

Options Database Key

-pc_gamg_reuse_interpolation <true,false>

Notes

this may negatively affect the convergence rate of the method on new matrices if the matrix entries change a great deal, but allows rebuilding the preconditioner quicker.

Level

intermediate

Location

src/ksp/pc/impls/gamg/gamg.c

Implementations

PCGAMGSetReuseInterpolation_GAMG in src/ksp/pc/impls/gamg/gamg.c

Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages