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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML3.2 EN">
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<TITLE>DMMGSetSNES</TITLE>
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<A NAME="DMMGSetSNES"><H1>DMMGSetSNES</H1></A>
Sets the nonlinear function that defines the nonlinear set of equations to be solved using the grid hierarchy.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscda.h"
#include "petscmg.h"
#include "petscdmmg.h"
#include "petscmat.h"
PetscErrorCode PETSCSNES_DLLEXPORT DMMGSetSNES(DMMG *dmmg,PetscErrorCode (*function)(SNES,Vec,Vec,void*),PetscErrorCode (*jacobian)(SNES,Vec,Mat*,Mat*,MatStructure*,void*))
</PRE>
Collective on <A HREF="../DA/DMMG.html#DMMG">DMMG</A>
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>dmmg </B></TD><TD>- the context
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>function </B></TD><TD>- the function that defines the nonlinear system
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>jacobian </B></TD><TD>- optional function to compute Jacobian
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Options Database Keys</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-dmmg_snes_monitor</B></TD><TD>- . -dmmg_jacobian_fd
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-dmmg_jacobian_ad</B></TD><TD>- . -dmmg_jacobian_mf_fd_operator
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-dmmg_jacobian_mf_fd</B></TD><TD>- . -dmmg_jacobian_mf_ad_operator
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-dmmg_jacobian_mf_ad</B></TD><TD>- . -dmmg_iscoloring_type
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-dmmg_jacobian_period <p> </B></TD><TD>- Indicates how often in the <A HREF="../SNES/SNES.html#SNES">SNES</A> solve the Jacobian is recomputed (on all levels)
as suggested by Florin Dobrian if p is -1 then Jacobian is computed only on first
<A HREF="../SNES/SNES.html#SNES">SNES</A> iteration (i.e. -1 is equivalent to infinity)
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../DA/DMMGCreate.html#DMMGCreate">DMMGCreate</A>(), <A HREF="../DA/DMMGDestroy.html#DMMGDestroy">DMMGDestroy</A>, <A HREF="../DA/DMMGSetKSP.html#DMMGSetKSP">DMMGSetKSP</A>(), <A HREF="../DA/DMMGSetSNESLocal.html#DMMGSetSNESLocal">DMMGSetSNESLocal</A>()
<BR>
<P>
<P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>advanced
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/snes/utils/damgsnes.c.html#DMMGSetSNES">src/snes/utils/damgsnes.c</A>
<BR><A HREF="./index.html">Index of all DA routines</A>
<BR><A HREF="../../index.html">Table of Contents for all manual pages</A>
<BR><A HREF="../singleindex.html">Index of all manual pages</A>
<P><H3><FONT COLOR="#CC3333">Examples</FONT></H3>
<A HREF="../../../src/snes/examples/tutorials/ex18.c.html">src/snes/examples/tutorials/ex18.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex20.c.html">src/snes/examples/tutorials/ex20.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex22.c.html">src/snes/examples/tutorials/ex22.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex23.c.html">src/snes/examples/tutorials/ex23.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex24.c.html">src/snes/examples/tutorials/ex24.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex25.c.html">src/snes/examples/tutorials/ex25.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex31.c.html">src/snes/examples/tutorials/ex31.c.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex34f90.F.html">src/snes/examples/tutorials/ex34f90.F.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex35f90.F90.html">src/snes/examples/tutorials/ex35f90.F90.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex36f90.F90.html">src/snes/examples/tutorials/ex36f90.F90.html</A><BR>
<A HREF="../../../src/snes/examples/tutorials/ex37f90.F90.html">src/snes/examples/tutorials/ex37f90.F90.html</A><BR>
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