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<div id="version" align=right><b>petsc-3.7.5 2017-01-01</b></div>
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<A NAME="DMPlexSNESComputeJacobianFEM"><H1>DMPlexSNESComputeJacobianFEM</H1></A>
Form the local portion of the Jacobian matrix J at the local solution X using pointwise functions specified by the user.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscdmplex.h"
#include "petscsnes.h"
PetscErrorCode DMPlexSNESComputeJacobianFEM(DM dm, Vec X, Mat Jac, Mat JacP,void *user)
</PRE>
<H3><FONT COLOR="#CC3333">Input Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>dm </B></TD><TD>- The mesh
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>X </B></TD><TD>- Local input vector
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>user </B></TD><TD>- The user context
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B>Jac </B> -Jacobian matrix
<br>
<P>
<H3><FONT COLOR="#CC3333">Note</FONT></H3>
The first member of the user context must be an FEMContext.
<P>
We form the residual one batch of elements at a time. This allows us to offload work onto an accelerator,
like a GPU, or vectorize on a multicore machine.
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
FormFunctionLocal()
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>developer
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/snes/utils/dmplexsnes.c.html#DMPlexSNESComputeJacobianFEM">src/snes/utils/dmplexsnes.c</A>
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