EPSGDSetDoubleExpansion

Activate the double expansion variant of GD.

Synopsis

#include "slepceps.h" 
PetscErrorCode EPSGDSetDoubleExpansion(EPS eps,PetscBool doubleexp)

Logically Collective

Input Parameters

• eps - the eigenproblem solver context

• doubleexp - the boolean flag

Options Database Keys

• -eps_gd_double_expansion - activate the double-expansion variant of GD

Notes

In the double expansion variant the search subspace is expanded with K*[Ax Bx] instead of the classic K*r, where K is the preconditioner, x the selected approximate eigenvector and r its associated residual vector.

See Also

EPSGDGetDoubleExpansion()

Level

advanced

Location

src/eps/impls/davidson/gd/gd.c

Implementations

EPSGDSetDoubleExpansion_GD() in src/eps/impls/davidson/gd/gd.c

---

Index of all EPS routines Table of Contents for all manual pages Index of all manual pages