MatMultEqual#

Compares matrix-vector products of two matrices using n random vectors

Synopsis#

#include "petscmat.h"  
PetscErrorCode MatMultEqual(Mat A, Mat B, PetscInt n, PetscBool *flg)

Collective

Input Parameters#

  • A - the first matrix

  • B - the second matrix

  • n - number of random vectors to be tested

Output Parameter#

Note#

The tolerance for equality is a generous PETSC_SQRT_MACHINE_EPSILON in the norm of the difference of the two computed vectors to allow for differences in the numerical computations. Hence this routine may indicate equality even if there is a small systematic difference between the two matrices.

See Also#

Mat, MatMultAddEqual(), MatMultTransposeEqual(), MatMultTransposeAddEqual(), MatIsLinear(), MatEqual()

Level#

intermediate

Location#

src/mat/utils/multequal.c

Examples#

src/ksp/ksp/tutorials/ex81.c


Index of all Mat routines
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Index of all manual pages