petsc-3.5.4 2015-05-23
MatFindOffBlockDiagonalEntries
Finds all the rows of a matrix that have entries outside of the main diagonal block (defined by the matrix block size)
Synopsis
#include "petscmat.h"
PetscErrorCode MatFindOffBlockDiagonalEntries(Mat mat,IS *is)
Collective on Mat
Input Parameter
mat -the matrix
Output Parameter
is -contains the list of rows with off block diagonal entries
See Also
MatMultTranspose(), MatMultAdd(), MatMultTransposeAdd()
Level:developer
Location:src/mat/interface/matrix.c
Index of all Mat routines
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Index of all manual pages