petsc-3.7.1 2016-05-15
DMSNESGetNGS
get SNES Gauss-Seidel relaxation function
Synopsis
#include "petscsnes.h"
#include "petscdm.h"
PetscErrorCode DMSNESGetNGS(DM dm,PetscErrorCode (**f)(SNES,Vec,Vec,void*),void **ctx)
Not Collective Many br
Input Argument
dm -DM to be used with SNES Many br
Output Arguments
| f | - relaxation function which performs Gauss-Seidel sweeps, see SNESGSFunction Many br |
| ctx | - context for residual evaluation Many br |
Many br
Note
SNESGetNGS() is normally used, but it calls this function internally because the user context is actually Many brassociated with the DM. This makes the interface consistent regardless of whether the user interacts with a DM or Many brnot. If DM took a more central role at some later date, this could become the primary method of setting the residual. Many br
See Also
DMSNESSetContext(), SNESGetNGS(), DMSNESGetJacobian(), DMSNESGetFunction(), SNESNGSFunction
Level:advanced
Location:src/snes/utils/dmsnes.c
Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages