NEPRIISetConstCorrectionTol#

Sets a flag to keep the tolerance used in the linear solver constant.

Synopsis#

#include "slepcnep.h" 
PetscErrorCode NEPRIISetConstCorrectionTol(NEP nep,PetscBool cct)

Logically Collective

Input Parameters#

  • nep - the nonlinear eigensolver context

  • cct - if PETSC_FALSE, the KSP relative tolerance is set to \(2^{-i}\)

Options Database Key#

  • -nep_rii_const_correction_tol - set a constant or dynamic stopping criterion

Notes#

By default, an exponentially decreasing tolerance is set in the KSP used within the nonlinear iteration, so that each Newton iteration requests better accuracy than the previous one. The constant correction tolerance flag stops this behavior.

See Also#

NEP: Nonlinear Eigenvalue Problems, NEPRII, NEPRIIGetConstCorrectionTol(), NEPRIIGetKSP()

Level#

intermediate

Location#

src/nep/impls/rii/rii.c

Implementations#

NEPRIISetConstCorrectionTol_RII() in src/nep/impls/rii/rii.c

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