KSPSetComputeRitz#
Sets a flag so that the Ritz or harmonic Ritz pairs will be calculated via a Lanczos or Arnoldi process as the linear system is solved.
Synopsis#
#include "petscksp.h" 
#include "petscmat.h" 
PetscErrorCode KSPSetComputeRitz(KSP ksp, PetscBool flg)
Logically Collective
Input Parameters#
- ksp - iterative solver obtained from - KSPCreate()
- flg - - PETSC_TRUEor- PETSC_FALSE
Note#
Currently this option is only valid for the KSPGMRES method.
See Also#
KSP: Linear System Solvers, KSPComputeRitz(), KSP, KSPComputeEigenvalues(), KSPComputeExtremeSingularValues()
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