petsc-master 2014-09-19
Report Typos and Errors

SNESSetNGS

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

Synopsis

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

Input Parameters

snes - the SNES context
f - function evaluation routine to apply Gauss-Seidel see SNESNGSFunction
ctx - [optional] user-defined context for private data for the smoother evaluation routine (may be NULL)

Notes

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

Keywords

SNES, nonlinear, set, Gauss-Seidel

See Also

SNESGetFunction(), SNESComputeNGS()

Level:intermediate
Location:
src/snes/interface/snes.c
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages

Examples

src/snes/examples/tutorials/ex5.c.html
src/snes/examples/tutorials/ex15.c.html
src/snes/examples/tutorials/ex19.c.html