petsc-3.3-p7 2013-05-11

MatNullSpaceGetVecs

get vectors defining the null space

#include "petscmat.h" 
PetscErrorCode MatNullSpaceGetVecs(MatNullSpace sp,PetscBool *has_const,PetscInt *n,const Vec **vecs)

Not Collective

sp -null space object

	has_cnst	- PETSC_TRUE if the null space contains the constant vector, otherwise PETSC_FALSE
	n	- number of vectors (excluding constant vector) in null space
	vecs	- orthonormal vectors that span the null space (excluding the constant vector)