PCHYPRESetDiscreteGradient#
Set discrete gradient matrix for PCHYPRE type of ams or ads
Synopsis#
#include "petscpc.h"
PetscErrorCode PCHYPRESetDiscreteGradient(PC pc, Mat G)
Collective
Input Parameters#
pc - the preconditioning context
G - the discrete gradient
Notes#
G should have as many rows as the number of edges and as many columns as the number of vertices in the mesh
Each row of G has 2 nonzeros, with column indexes being the global indexes of edge’s endpoints: matrix entries are +1 and -1 depending on edge orientation
Developer Notes#
This automatically converts the matrix to MATHYPRE if it is not already of that type
See Also#
KSP: Linear System Solvers, PCHYPRE, PCHYPRESetDiscreteCurl()
Level#
intermediate
Location#
Implementations#
PCHYPRESetDiscreteGradient_HYPRE() in src/ksp/pc/impls/hypre/hypre.c
Index of all PC routines
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Index of all manual pages