slepc-main 2024-11-15
NEPSetTwoSided
Sets the solver to use a two-sided variant so that left eigenvectors are also computed.
Synopsis
#include "slepcnep.h"
PetscErrorCode NEPSetTwoSided(NEP nep,PetscBool twosided)
Logically Collective
Input Parameters
| nep | - the eigensolver context
|
| twosided | - whether the two-sided variant is to be used or not
|
Options Database Keys
| -nep_two_sided <boolean> | - Sets/resets the twosided flag
|
Notes
If the user sets twosided=PETSC_TRUE then the solver uses a variant of
the algorithm that computes both right and left eigenvectors. This is
usually much more costly. This option is not available in all solvers.
When using two-sided solvers, the problem matrices must have both the
MatMult and MatMultTranspose operations defined.
See Also
NEPGetTwoSided(), NEPGetLeftEigenvector()
Level
advanced
Location
src/nep/interface/nepopts.c
Examples
src/nep/tutorials/ex42.c
Index of all NEP routines
Table of Contents for all manual pages
Index of all manual pages