EPSGetInvariantSubspace#
Gets an orthonormal basis of the computed invariant subspace.
Synopsis#
#include "slepceps.h"
PetscErrorCode EPSGetInvariantSubspace(EPS eps,Vec v[])
Collective
Input Parameter#
eps - the eigensolver context
Output Parameter#
v - an array of vectors
Notes#
This function should be called after EPSSolve() has finished.
The user should provide in v an array of nconv vectors, where nconv is the value returned by EPSGetConverged().
The first k vectors returned in v span an invariant subspace associated with the first k computed eigenvalues (note that this is not true if the k-th eigenvalue is complex and matrix A is real; in this case the first k+1 vectors should be used). An invariant subspace X of A satisfies Ax in X for all x in X (a similar definition applies for generalized eigenproblems).
See Also#
EPSGetEigenpair(), EPSGetConverged(), EPSSolve()
Level#
intermediate
Location#
Index of all EPS routines Table of Contents for all manual pages Index of all manual pages