petsc-3.8.4 2018-03-24

MatMatMultEqual

Test A*B*x = C*x for n random vector x

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

Collective on Mat

	A	- the first matrix
	B	- the second matrix

C -the third matrix

n -number of random vectors to be tested

flg -PETSC_TRUE if the products are equal; PETSC_FALSE otherwise.