PCShellSetApplyRichardson

 Sets routine to use as preconditioner in Richardson iteration.

Synopsis

#include "petscpc.h" 
PetscErrorCode PETSCKSP_DLLEXPORT PCShellSetApplyRichardson(PC pc,PetscErrorCode (*apply)(void*,Vec,Vec,Vec,PetscReal,PetscReal,PetscReal,PetscInt))
Collective on PC

Input Parameters

pc - the preconditioner context
apply - the application-provided preconditioning routine

Calling sequence of apply

   PetscErrorCode apply (void *ptr,Vec b,Vec x,Vec r,PetscReal rtol,PetscReal abstol,PetscReal dtol,PetscInt maxits)

ptr - the application context
b - right-hand-side
x - current iterate
r - work space
rtol - relative tolerance of residual norm to stop at
abstol - absolute tolerance of residual norm to stop at
dtol - if residual norm increases by this factor than return
maxits - number of iterations to run

Keywords

PC, shell, set, apply, Richardson, user-provided

See Also

PCShellSetApply(), PCShellSetContext()

Level:developer
Location:src/ksp/pc/impls/shell/shellpc.c
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