petsc-3.5.1 2014-07-24
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MatNullSpaceGetVecs

get vectors defining the null space

Synopsis

#include "petscmat.h" 
PetscErrorCode MatNullSpaceGetVecs(MatNullSpace sp,PetscBool *has_const,PetscInt *n,const Vec **vecs)
Not Collective

Input Arguments

sp -null space object

Output Arguments

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)

See Also

MatNullSpaceCreate(), MatGetNullSpace(), MatGetNearNullSpace()

Level:developer
Location:
src/mat/interface/matnull.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages

Examples

src/ksp/ksp/examples/tutorials/ex49.c.html