slepc-main 2024-11-15
PEPSTOARSetDetectZeros
Sets a flag to enforce detection of zeros during the factorizations throughout the spectrum slicing computation.
Synopsis
#include "slepcpep.h"
PetscErrorCode PEPSTOARSetDetectZeros(PEP pep,PetscBool detect)
Logically Collective
Input Parameters
| pep | - the eigenproblem solver context
|
| detect | - check for zeros
|
Options Database Key
| -pep_stoar_detect_zeros | - Check for zeros; this takes an optional
bool value (0/1/no/yes/true/false)
|
Notes
A zero in the factorization indicates that a shift coincides with an eigenvalue.
This flag is turned off by default, and may be necessary in some cases.
This feature currently requires an external package for factorizations
with support for zero detection, e.g. MUMPS.
See Also
PEPSetInterval()
Level
advanced
Location
src/pep/impls/krylov/stoar/stoar.c
Examples
src/pep/tutorials/ex38.c
Index of all PEP routines
Table of Contents for all manual pages
Index of all manual pages