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<div id="version" align=right><b>petsc-3.14.5 2021-03-03</b></div>
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<A NAME="DMSNESCheckJacobian"><H1>DMSNESCheckJacobian</H1></A>
Check the Jacobian of the exact solution against the residual using the Taylor Test
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscdmplex.h"
#include "petscsnes.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../SNES/DMSNESCheckJacobian.html#DMSNESCheckJacobian">DMSNESCheckJacobian</A>(<A HREF="../SNES/SNES.html#SNES">SNES</A> snes, <A HREF="../DM/DM.html#DM">DM</A> dm, <A HREF="../Vec/Vec.html#Vec">Vec</A> u, <A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> tol, <A HREF="../Sys/PetscBool.html#PetscBool">PetscBool</A> *isLinear, <A HREF="../Sys/PetscReal.html#PetscReal">PetscReal</A> *convRate)
</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>snes </B></TD><TD>- the <A HREF="../SNES/SNES.html#SNES">SNES</A> object
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>dm </B></TD><TD>- the <A HREF="../DM/DM.html#DM">DM</A>
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>u </B></TD><TD>- a <A HREF="../DM/DM.html#DM">DM</A> vector
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>tol </B></TD><TD>- A tolerance for the check, or -1 to print the results instead
</TD></TR></TABLE>
<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>isLinear </B></TD><TD>- Flag indicaing that the function looks linear, or NULL
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>convRate </B></TD><TD>- The rate of convergence of the linear model, or NULL
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
DNSNESCheckFromOptions(), <A HREF="../SNES/DMSNESCheckDiscretization.html#DMSNESCheckDiscretization">DMSNESCheckDiscretization</A>(), <A HREF="../SNES/DMSNESCheckResidual.html#DMSNESCheckResidual">DMSNESCheckResidual</A>()
<BR><P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>developer<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/snes/utils/dmplexsnes.c.html#DMSNESCheckJacobian">src/snes/utils/dmplexsnes.c</A>
<BR><A HREF="./index.html">Index of all SNES routines</A>
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