#include "petscpc.h" PetscErrorCode PCShellSetApplyRichardson(PC pc,PetscErrorCode (*apply)(PC,Vec,Vec,Vec,PetscReal,PetscReal,PetscReal,PetscInt,PetscBool,PetscInt*,PCRichardsonConvergedReason*))Logically Collective on PC
| pc | - the preconditioner context | |
| apply | - the application-provided preconditioning routine |
PetscErrorCode apply (PC pc,Vec b,Vec x,Vec r,PetscReal rtol,PetscReal abstol,PetscReal dtol,PetscInt maxits)
| pc | - the preconditioner, get the application context with PCShellGetContext() | |
| 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 |
Notes: the function MUST return an error code of 0 on success and nonzero on failure.