petsc-3.13.6 2020-09-29

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)

These vectors and the array are owned by the MatNullSpace and should not be destroyed or freeded by the caller

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