#include "slepceps.h" PetscErrorCode EPSGetEigenvector(EPS eps,PetscInt i,Vec Vr,Vec Vi)Logically Collective on eps
eps | - eigensolver context | |
i | - index of the solution |
Vr | - real part of eigenvector | |
Vi | - imaginary part of eigenvector |
If the corresponding eigenvalue is real, then Vi is set to zero. If PETSc is configured with complex scalars the eigenvector is stored directly in Vr (Vi is set to zero). In any case, the user can pass NULL in Vr or Vi if one of them is not required.
The index i should be a value between 0 and nconv-1 (see EPSGetConverged()). Eigenpairs are indexed according to the ordering criterion established with EPSSetWhichEigenpairs().
The 2-norm of the eigenvector is one unless the problem is generalized Hermitian. In this case the eigenvector is normalized with respect to the norm defined by the B matrix.