MatIsTranspose#
Test whether a matrix is another one’s transpose, or its own, in which case it tests symmetry.
Synopsis#
#include "petscmat.h"
PetscErrorCode MatIsTranspose(Mat A, Mat B, PetscReal tol, PetscBool *flg)
Collective
Input Parameters#
A - the matrix to test
B - the matrix to test against, this can equal the first parameter
tol - tolerance, differences between entries smaller than this are counted as zero
Output Parameter#
flg - the result
Notes#
Only available for MATAIJ matrices.
The sequential algorithm has a running time of the order of the number of nonzeros; the parallel test involves parallel copies of the block off-diagonal parts of the matrix.
See Also#
Matrices, Mat, MatTranspose(), MatIsSymmetric(), MatIsHermitian()
Level#
intermediate
Location#
Implementations#
MatIsTranspose_MPIAIJ() in src/mat/impls/aij/mpi/mpiaij.c
MatIsTranspose_SeqAIJ() in src/mat/impls/aij/seq/aij.c
MatIsTranspose_SeqBAIJ() in src/mat/impls/baij/seq/baij.c
MatIsTranspose_MPISELL() in src/mat/impls/sell/mpi/mpisell.c
Index of all Mat routines
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Index of all manual pages