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<A NAME="TSGetIJacobian"><H1>TSGetIJacobian</H1></A>
Returns the implicit Jacobian at the present timestep.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscts.h"
PetscErrorCode PETSCTS_DLLEXPORT TSGetIJacobian(TS ts,Mat *A,Mat *B,TSIJacobian *f,void **ctx)
</PRE>
Not Collective, but parallel objects are returned if <A HREF="../TS/TS.html#TS">TS</A> is parallel
<P>
<H3><FONT COLOR="#CC3333">Input Parameter</FONT></H3>
<DT><B>ts </B> -The <A HREF="../TS/TS.html#TS">TS</A> context obtained from <A HREF="../TS/TSCreate.html#TSCreate">TSCreate</A>()
<br>
<P>
<H3><FONT COLOR="#CC3333">Output Parameters</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>A </B></TD><TD>- The Jacobian of F(t,U,U_t)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>B </B></TD><TD>- The preconditioner matrix, often the same as A
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>f </B></TD><TD>- The function to compute the matrices
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ctx </B></TD><TD>- User-defined context for Jacobian evaluation routine
</TD></TR></TABLE>
<P>
Notes: You can pass in <A HREF="../Sys/PETSC_NULL.html#PETSC_NULL">PETSC_NULL</A> for any return argument you do not need.
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../TS/TSGetTimeStep.html#TSGetTimeStep">TSGetTimeStep</A>(), <A HREF="../TS/TSGetRHSJacobian.html#TSGetRHSJacobian">TSGetRHSJacobian</A>(), <A HREF="../TS/TSGetMatrices.html#TSGetMatrices">TSGetMatrices</A>(), <A HREF="../TS/TSGetTime.html#TSGetTime">TSGetTime</A>(), <A HREF="../TS/TSGetTimeStepNumber.html#TSGetTimeStepNumber">TSGetTimeStepNumber</A>()
<BR>
<P>
<H3><FONT COLOR="#CC3333">Keywords</FONT></H3>
<A HREF="../TS/TS.html#TS">TS</A>, timestep, get, matrix, Jacobian
<BR><P><B><P><B><FONT COLOR="#CC3333">Level:</FONT></B>advanced
<BR><FONT COLOR="#CC3333">Location:</FONT></B><A HREF="../../../src/ts/interface/ts.c.html#TSGetIJacobian">src/ts/interface/ts.c</A>
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