petsc-3.14.6 2021-03-30
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KSPGetComputeEigenvalues

 Gets the flag indicating that the extreme eigenvalues values will be calculated via a Lanczos or Arnoldi process as the linear system is solved.

Synopsis

#include "petscksp.h" 
#include "petscmat.h" 
PetscErrorCode  KSPGetComputeEigenvalues(KSP ksp,PetscBool  *flg)
Not Collective

Input Parameter

ksp - iterative context obtained from KSPCreate()

Output Parameter

flg - PETSC_TRUE or PETSC_FALSE

Notes

Currently this option is not valid for all iterative methods.

See Also

KSPComputeEigenvalues(), KSPComputeEigenvaluesExplicitly(), KSP

Level

advanced

Location

src/ksp/ksp/interface/itfunc.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages