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 context obtained from KSPCreate()

• flg - PETSC_TRUE or PETSC_FALSE

Note

Currently this option is only valid for the KSPGMRES method.

See Also

KSP: Linear System Solvers, KSPComputeRitz(), KSP

Level

advanced

Location

src/ksp/ksp/interface/itfunc.c

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Index of all KSP routines
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Index of all manual pages