petsc-3.7.1 2016-05-15
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KSPChebyshevEstEigSetUseRandom

 use a random right hand side in order to do the estimate instead of the given right hand side

Synopsis

#include "petscksp.h" 
PetscErrorCode KSPChebyshevEstEigSetUseRandom(KSP ksp,PetscBool use)
Logically Collective Many br

Input Arguments

ksp - linear solver context Many br
use - PETSC_TRUE to use random Many br

Options Database

Use KSPChebyshevEstEigSetRandom() to provide the random number generator to be used. Otherwise it creates a default Many br

Many br

See Also

KSPChebyshevEstEigSet(), PetscRandomCreate(), KSPChebyshevEstEigSetRandom()

Level:intermediate
Location:src/ksp/ksp/impls/cheby/cheby.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages

-ksp_chebyshev_esteig_random <true,false>- Many brNotes: This alledgely works better for multigrid smoothers Many br