petsc-3.10.2 2018-10-09
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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