PETSc version 3.17.4
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# DMSNESSetFunction

set SNES residual evaluation function

### Synopsis

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

Not Collective

### Input Parameters

| dm | - DM to be used with SNES
| f | - residual evaluation function; see SNESFunction for details
| ctx | - context for residual evaluation

### Note

SNESSetFunction() is normally used, but it calls this function internally because the user context is actually associated with the DM. This makes the interface consistent regardless of whether the user interacts with a DM or not. If DM took a more central role at some later date, this could become the primary method of setting the residual.

### See Also

DMSNESSetContext(), SNESSetFunction(), DMSNESSetJacobian(), SNESFunction

### Level

advanced

### Location

src/snes/utils/dmsnes.c
Index of all SNES routines
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Index of all manual pages