DMDASNESSetPicardLocal

set a local right-hand side and matrix evaluation function for Picard iteration with DMDA

Synopsis

#include "petscdmda.h" 
#include "petscsnes.h" 
PetscErrorCode DMDASNESSetPicardLocal(DM dm, InsertMode imode, PetscErrorCode (*func)(DMDALocalInfo *info, void *x, void *f, void *ctx), PetscErrorCode (*jac)(DMDALocalInfo *info, void *x, Mat jac, Mat Jp, void *ctx), void *ctx)

Logically Collective

Input Parameters

• dm - DM to associate callback with

• imode - INSERT_VALUES if local function computes owned part, ADD_VALUES if it contributes to ghosted part

• func - local residual evaluation

• jac - function to compute Jacobian

• ctx - optional context for local residual evaluation

Calling sequence of func

• info - defines the subdomain to evaluate the residual on

• x - dimensional pointer to state at which to evaluate residual

• f - dimensional pointer to residual, write the residual here

• ctx - optional context passed above

Calling sequence of jac

• info - defines the subdomain to evaluate the residual on

• x - dimensional pointer to state at which to evaluate residual

• jac - the Jacobian

• Jp - approximation to the Jacobian used to compute the preconditioner, often J

• ctx - optional context passed above

Note

The user must use SNESSetFunction(snes,NULL,SNESPicardComputeFunction,&user)); in their code before calling this routine.

See Also

SNES: Nonlinear Solvers, SNES, DMDA, DMSNESSetFunction(), DMDASNESSetJacobian(), DMDACreate1d(), DMDACreate2d(), DMDACreate3d()

Level

beginner

Location

src/snes/utils/dmdasnes.c

Examples

src/snes/tutorials/ex15.c

---

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