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" 
int KSPSetInitialGuessNonzero(KSP ksp,PetscTruth flg)

Collective on KSP

Input Parameters

	ksp	- iterative context obtained from SLESGetKSP() or KSPCreate()
	flg	- PETSC_TRUE indicates the guess is non-zero, PETSC_FALSE indicates the guess is zero

Notes

If this is not called the X vector is zeroed in the call to SLESSolve() (or KSPSolve()).

Keywords

KSP, set, initial guess, nonzero

Examples