petsc-3.14.6 2021-03-30
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KSPSetComputeEigenvalues

 Sets a flag so 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  KSPSetComputeEigenvalues(KSP ksp,PetscBool flg)
Logically Collective on ksp

Input Parameters

ksp - iterative context obtained from KSPCreate()
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

Examples

src/ksp/ksp/tutorials/ex71.c.html

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