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 on A

Input Parameters#

  • A - the matrix to test

  • B - the matrix to test against, this can equal the first parameter

Output Parameters#

  • 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-offdiagonal parts of the matrix.

See Also#

MatTranspose(), MatIsSymmetric(), MatIsHermitian()

Level#

intermediate

Location#

src/mat/interface/matrix.c

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


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