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<div id="version" align=right><b>petsc-3.14.5 2021-03-03</b></div>
<div id="bugreport" align=right><a href="mailto:petsc-maint@mcs.anl.gov?subject=Typo or Error in Documentation &body=Please describe the typo or error in the documentation: petsc-3.14.5 v3.14.5 docs/manualpages/Mat/MatShellTestMultTranpose.html "><small>Report Typos and Errors</small></a></div>
<A NAME="MatShellTestMultTranpose"><H1>MatShellTestMultTranpose</H1></A>
Compares the multiply transpose routine provided to the <A HREF="../Mat/MATSHELL.html#MATSHELL">MATSHELL</A> with differencing on a given function.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscmat.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> MatShellTestMultTranspose(<A HREF="../Mat/Mat.html#Mat">Mat</A> mat,<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> (*f)(void*,<A HREF="../Vec/Vec.html#Vec">Vec</A>,<A HREF="../Vec/Vec.html#Vec">Vec</A>),<A HREF="../Vec/Vec.html#Vec">Vec</A> base,void *ctx,<A HREF="../Sys/PetscBool.html#PetscBool">PetscBool</A> *flg)
</PRE>
Logically Collective on <A HREF="../Mat/Mat.html#Mat">Mat</A>
<P>
<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>mat </B></TD><TD>- the shell matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>f </B></TD><TD>- the function
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>base </B></TD><TD>- differences are computed around this vector, see <A HREF="../Mat/MatMFFDSetBase.html#MatMFFDSetBase">MatMFFDSetBase</A>(), for Jacobians this is the point at which the Jacobian is being evaluated
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>ctx </B></TD><TD>- an optional context for the function
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>flg </B></TD><TD>- <A HREF="../Sys/PETSC_TRUE.html#PETSC_TRUE">PETSC_TRUE</A> if the multiply is likely correct
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Options Database</FONT></H3>
<TABLE border="0" cellpadding="0" cellspacing="0">
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>-mat_shell_test_mult_view </B></TD><TD>- print if any differences are detected between the products and print the difference
</TD></TR></TABLE>
<P>
<P>
<H3><FONT COLOR="#CC3333">Fortran Notes</FONT></H3>
Not supported from Fortran
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MatCreateShell.html#MatCreateShell">MatCreateShell</A>(), <A HREF="../Mat/MatShellGetContext.html#MatShellGetContext">MatShellGetContext</A>(), <A HREF="../Mat/MatShellGetOperation.html#MatShellGetOperation">MatShellGetOperation</A>(), <A HREF="../Mat/MatShellTestMult.html#MatShellTestMult">MatShellTestMult</A>()
<BR><P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>advanced<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/mat/impls/shell/shell.c.html#MatShellTestMultTranpose">src/mat/impls/shell/shell.c</A>
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