EPSGetInvariantSubspaceLeft

Gets an orthonormal basis of the computed left invariant subspace (only available in two-sided eigensolvers).

Synopsis

#include "slepceps.h" 
PetscErrorCode EPSGetInvariantSubspaceLeft(EPS eps, Vec *v)
Not Collective, but vectors are shared by all processors that share the EPS

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 a left 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). A left invariant subspace Y of A satisfies y'A in Y for all y in Y (a similar definition applies for generalized eigenproblems).

See Also

EPSGetEigenpair(), EPSGetConverged(), EPSSolve(), EPSGetInvariantSubspace

Location: src/eps/interface/solve.c
Index of all EPS routines
Table of Contents for all manual pages
Index of all manual pages