slepc-main 2024-11-09
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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