petsc-3.8.4 2018-03-24

DMSNESGetFunction

get SNES residual evaluation function

#include "petscsnes.h" 
#include "petscdm.h" 
PetscErrorCode DMSNESGetFunction(DM dm,PetscErrorCode (**f)(SNES,Vec,Vec,void*),void **ctx)

Not Collective

dm -DM to be used with SNES

	f	- residual evaluation function; see SNESFunction for details
	ctx	- context for residual evaluation

SNESGetFunction() is normally used, but it calls this function internally because the user context is actually associated with the DM.