petsc-3.9.4 2018-09-11
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
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
Table of Contents for all manual pages
Index of all manual pages