KSPSetInitialGuessNonzero#
Tells the iterative solver that the initial guess is nonzero; otherwise KSP
assumes the initial guess is to be zero (and thus zeros it out before solving).
Synopsis#
#include "petscksp.h"
#include "petscmat.h"
PetscErrorCode KSPSetInitialGuessNonzero(KSP ksp, PetscBool flg)
Logically Collective
Input Parameters#
ksp - iterative context obtained from
KSPCreate()
flg -
PETSC_TRUE
indicates the guess is non-zero,PETSC_FALSE
indicates the guess is zero
Options Database Key#
-ksp_initial_guess_nonzero <true,false> - use nonzero initial guess
Note#
If this is not called the X vector is zeroed in the call to KSPSolve()
.
See Also#
KSP: Linear System Solvers, KSPGetInitialGuessNonzero()
, KSPGuessSetType()
, KSPGuessType
, KSP
Level#
beginner
Location#
Examples#
src/ksp/ksp/tutorials/ex51.c
src/ksp/ksp/tutorials/ex27.c
src/ksp/pc/tutorials/ex2.c
src/ksp/ksp/tutorials/ex84.c
src/ksp/pc/tutorials/ex1.c
src/ksp/ksp/tutorials/ex6f.F90
src/ksp/ksp/tutorials/ex56.c
src/ksp/ksp/tutorials/ex9.c
src/ksp/ksp/tutorials/ex71.c
src/ksp/ksp/tutorials/ex72.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages