petsc-3.11.1 2019-04-12
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PCHYPRESetDiscreteGradient

Set discrete gradient matrix

Synopsis

#include "petscpc.h" 
PetscErrorCode PCHYPRESetDiscreteGradient(PC pc, Mat G)
Collective on PC

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

See Also


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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Index of all manual pages