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#

src/ksp/pc/impls/hypre/hypre.c

Implementations#

PCHYPRESetDiscreteGradient_HYPRE() in src/ksp/pc/impls/hypre/hypre.c


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