petsc-3.14.6 2021-03-30
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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 Mat

Input Parameter

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 SeqAIJ/MPIAIJ 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

Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages