slepc-main 2024-11-15
NEPRIISetDeflationThreshold
Sets the threshold value used to switch between deflated and non-deflated iteration.
Synopsis
#include "slepcnep.h"
PetscErrorCode NEPRIISetDeflationThreshold(NEP nep,PetscReal deftol)
Logically Collective
Input Parameters
| nep | - nonlinear eigenvalue solver
|
| deftol | - the threshold value
|
Options Database Keys
| -nep_rii_deflation_threshold <deftol> | - set the threshold
|
Notes
Normally, the solver iterates on the extended problem in order to deflate
previously converged eigenpairs. If this threshold is set to a nonzero value,
then once the residual error is below this threshold the solver will
continue the iteration without deflation. The intention is to be able to
improve the current eigenpair further, despite having previous eigenpairs
with somewhat bad precision.
See Also
NEPRIIGetDeflationThreshold()
Level
advanced
Location
src/nep/impls/rii/rii.c
Index of all NEP routines
Table of Contents for all manual pages
Index of all manual pages