KSPSetComputeInitialGuess#

set routine to compute the initial guess of the linear system

Synopsis#

#include "petscksp.h" 
#include "petscmat.h" 
PetscErrorCode KSPSetComputeInitialGuess(KSP ksp, KSPComputeInitialGuessFn *func, void *ctx)

Logically Collective

Input Parameters#

  • ksp - the KSP context

  • func - function to compute the initial guess, see KSPComputeInitialGuessFn for calling sequence

  • ctx - optional context

Note#

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

See Also#

KSP: Linear System Solvers, KSP, KSPSolve(), KSPSetComputeRHS(), KSPSetComputeOperators(), DMKSPSetComputeInitialGuess(), KSPSetInitialGuessNonzero(), KSPComputeInitialGuessFn

Level#

beginner

Location#

src/ksp/ksp/interface/itfunc.c

Examples#

src/ksp/ksp/tutorials/ex45.c

Index of all KSP routines
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Index of all manual pages