slepc-main 2024-12-17
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*[A*x B*x]
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
Index of all EPS routines
Table of Contents for all manual pages
Index of all manual pages