petsc-3.14.6 2021-03-30
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KSPChebyshevSetEigenvalues

 Sets estimates for the extreme eigenvalues of the preconditioned problem.

Synopsis

#include "petscksp.h" 
PetscErrorCode  KSPChebyshevSetEigenvalues(KSP ksp,PetscReal emax,PetscReal emin)
Logically Collective on ksp

Input Parameters

ksp - the Krylov space context
emax, emin - the eigenvalue estimates

Options Database

-ksp_chebyshev_eigenvalues emin,emax

Note: Call KSPChebyshevEstEigSet() or use the option -ksp_chebyshev_esteig a,b,c,d to have the KSP estimate the eigenvalues and use these estimated values automatically

Level

intermediate

Location

src/ksp/ksp/impls/cheby/cheby.c

Implementations

KSPChebyshevSetEigenvalues_Chebyshev in src/ksp/ksp/impls/cheby/cheby.c

Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages