petsc-3.7.7 2017-09-25
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Set discrete gradient matrix


#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

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