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

Input Parameter#

mat - the matrix

Output Parameter#

is - contains the list of rows with off block diagonal entries

See Also#

Matrices, Mat, MatMultTranspose(), MatMultAdd(), MatMultTransposeAdd()

Level#

developer

Location#

src/mat/interface/matrix.c

Implementations#

MatFindOffBlockDiagonalEntries_MPIAIJ in src/mat/impls/aij/mpi/mpiaij.c
MatFindOffBlockDiagonalEntries_SeqAIJ in src/mat/impls/aij/seq/aij.c

Index of all Mat routines
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Index of all manual pages