DSNEPSetRefine#

Sets the tolerance and the number of iterations of Newton iterative refinement for eigenpairs when solving a DSNEP.

Synopsis#

#include "slepcds.h" 
PetscErrorCode DSNEPSetRefine(DS ds,PetscReal tol,PetscInt its)

Logically Collective

Input Parameters#

  • ds - the direct solver context

  • tol - the tolerance

  • its - the number of iterations

Options Database Keys#

  • -ds_nep_refine_tol - sets the tolerance

  • -ds_nep_refine_its - sets the number of Newton iterations

Notes#

Iterative refinement of eigenpairs is currently used only in the contour integral method.

Use PETSC_CURRENT to retain the current value of any of the parameters. Use PETSC_DETERMINE for either argument to assign a default value computed internally.

See Also#

DS: Direct Solver (or Dense System), DSNEPGetRefine()

Level#

advanced

Location#

src/sys/classes/ds/impls/nep/dsnep.c

Implementations#

DSNEPSetRefine_NEP() in src/sys/classes/ds/impls/nep/dsnep.c

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