petsc-master 2019-07-23
Report Typos and Errors

KSPSetComputeInitialGuess

set routine to compute the initial guess of the linear system

Synopsis

#include "petscksp.h" 
PetscErrorCode KSPSetComputeInitialGuess(KSP ksp,PetscErrorCode (*func)(KSP,Vec,void*),void *ctx)
Logically Collective

Input Arguments

ksp - the KSP context
func - function to compute the initial guess
ctx - optional context

Calling sequence of func

 func(KSP ksp,Vec x,void *ctx)

ksp - the KSP context
x - solution vector
ctx - optional user-provided context

Notes: This should only be used in conjunction with KSPSetComputeRHS(), KSPSetComputeOperators(), otherwise call KSPSetInitialGuessNonzero() and set the initial guess values in the solution vector passed to KSPSolve().

See Also

KSPSolve(), KSPSetComputeRHS(), KSPSetComputeOperators(), DMKSPSetComputeInitialGuess()

Level

beginner

Location

src/ksp/ksp/interface/itfunc.c

Examples

src/ksp/ksp/examples/tutorials/ex45.c.html
src/ksp/ksp/examples/tutorials/ex45f.F90.html

Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages