petsc-3.14.6 2021-03-30
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KSPSetInitialGuessKnoll

 Tells the iterative solver to use PCApply(pc,b,..) to compute the initial guess (The Knoll trick)

Synopsis

#include "petscksp.h" 
#include "petscmat.h" 
PetscErrorCode  KSPSetInitialGuessKnoll(KSP ksp,PetscBool flg)
Logically Collective on ksp

Input Parameters

ksp - iterative context obtained from KSPCreate()
flg - PETSC_TRUE or PETSC_FALSE

Developer Note: the Knoll trick is not currently implemented using the KSPGuess class

See Also

KSPGetInitialGuessKnoll(), KSPSetInitialGuessNonzero(), KSPGetInitialGuessNonzero(), 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