SNESSetNGS#

Sets the user nonlinear Gauss-Seidel routine for use with composed nonlinear solvers.

Synopsis#

#include "petscsnes.h"  
PetscErrorCode SNESSetNGS(SNES snes, SNESNGSFn *f, void *ctx)

Input Parameters#

snes - the SNES context, usually of the SNESType SNESNGS
f - function evaluation routine to apply Gauss-Seidel, see SNESNGSFn for calling sequence
ctx - [optional] user-defined context for private data for the smoother evaluation routine (may be NULL)

Note#

The SNESNGS routines are used by the composed nonlinear solver to generate a problem appropriate update to the solution, particularly SNESFAS.

See Also#

SNES: Nonlinear Solvers, SNESNGS, SNESGetNGS(), SNESNCG, SNESGetFunction(), SNESComputeNGS(), SNESNGSFn

Level#

intermediate

Location#

src/snes/interface/snes.c

Examples#

src/snes/tutorials/ex55.c
src/snes/tutorials/ex19.c
src/snes/tutorials/ex5.c
src/snes/tutorials/ex15.c

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