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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="PCComputeOperator"><H1>PCComputeOperator</H1></A>
Computes the explicit preconditioned operator.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscksp.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../PC/PCComputeOperator.html#PCComputeOperator">PCComputeOperator</A>(<A HREF="../PC/PC.html#PC">PC</A> pc,<A HREF="../Mat/MatType.html#MatType">MatType</A> mattype,<A HREF="../Mat/Mat.html#Mat">Mat</A> *mat)
</PRE>
Collective on <A HREF="../PC/PC.html#PC">PC</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>pc </B></TD><TD>- the preconditioner object
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>mattype </B></TD><TD>- the matrix type to be used for the operator
</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>mat </B></TD><TD>- the explict preconditioned operator
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
This computation is done by applying the operators to columns of the identity matrix.
This routine is costly in general, and is recommended for use only with relatively small systems.
Currently, this routine uses a dense matrix format when mattype == NULL
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../KSP/KSPComputeOperator.html#KSPComputeOperator">KSPComputeOperator</A>(), <A HREF="../Mat/MatType.html#MatType">MatType</A>
<BR>
<P>
<P><B></B><H3><FONT COLOR="#CC3333">Level</FONT></H3>advanced<BR>
<H3><FONT COLOR="#CC3333">Location</FONT></H3>
</B><A HREF="../../../src/ksp/pc/interface/precon.c.html#PCComputeOperator">src/ksp/pc/interface/precon.c</A>
<BR><A HREF="./index.html">Index of all PC routines</A>
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