petsc-3.14.6 2021-03-30
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.
See Also
SNESGetFunction(), SNESComputeNGS()
Level
intermediate
Location
src/snes/interface/snes.c
Examples
src/snes/tutorials/ex5.c.html
src/snes/tutorials/ex15.c.html
src/snes/tutorials/ex19.c.html
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages