petsc-3.14.6 2021-03-30

KSPGetInitialGuessKnoll

Determines whether the KSP solver is using the Knoll trick (using PCApply(pc,b,...) to compute the initial guess

#include "petscksp.h" 
#include "petscmat.h" 
PetscErrorCode  KSPGetInitialGuessKnoll(KSP ksp,PetscBool  *flag)

Not Collective

ksp

- iterative context obtained from KSPCreate()

flag

- PETSC_TRUE if using Knoll trick, else PETSC_FALSE

advanced