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<div id="version" align=right><b>petsc-3.10.3 2018-12-18</b></div>
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<A NAME="MatCreateRedundantMatrix"><H1>MatCreateRedundantMatrix</H1></A>
Create redundant matrices and put them into processors of subcommunicators.
<H3><FONT COLOR="#CC3333">Synopsis</FONT></H3>
<PRE>
#include "petscmat.h"
<A HREF="../Sys/PetscErrorCode.html#PetscErrorCode">PetscErrorCode</A> <A HREF="../Mat/MatCreateRedundantMatrix.html#MatCreateRedundantMatrix">MatCreateRedundantMatrix</A>(<A HREF="../Mat/Mat.html#Mat">Mat</A> mat,<A HREF="../Sys/PetscInt.html#PetscInt">PetscInt</A> nsubcomm,<A HREF="../Sys/MPI_Comm.html#MPI_Comm">MPI_Comm</A> subcomm,<A HREF="../Mat/MatReuse.html#MatReuse">MatReuse</A> reuse,<A HREF="../Mat/Mat.html#Mat">Mat</A> *matredundant)
</PRE>
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 matrix
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>nsubcomm </B></TD><TD>- the number of subcommunicators (= number of redundant parallel or sequential matrices)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>subcomm </B></TD><TD>- MPI communicator split from the communicator where mat resides in (or MPI_COMM_NULL if nsubcomm is used)
</TD></TR>
<TR><TD WIDTH=40></TD><TD ALIGN=LEFT VALIGN=TOP><B>reuse </B></TD><TD>- either <A HREF="../Mat/MatReuse.html#MatReuse">MAT_INITIAL_MATRIX</A> or <A HREF="../Mat/MatReuse.html#MatReuse">MAT_REUSE_MATRIX</A>
</TD></TR></TABLE>
<P>
<H3><FONT COLOR="#CC3333">Output Parameter</FONT></H3>
<DT><B>matredundant </B> -redundant matrix
<br>
<P>
<H3><FONT COLOR="#CC3333">Notes</FONT></H3>
<A HREF="../Mat/MatReuse.html#MatReuse">MAT_REUSE_MATRIX</A> can only be used when the nonzero structure of the
original matrix has not changed from that last call to <A HREF="../Mat/MatCreateRedundantMatrix.html#MatCreateRedundantMatrix">MatCreateRedundantMatrix</A>().
<P>
This routine creates the duplicated matrices in subcommunicators; you should NOT create them before
calling it.
<P>
<P>
<P>
<H3><FONT COLOR="#CC3333">See Also</FONT></H3>
<A HREF="../Mat/MatDestroy.html#MatDestroy">MatDestroy</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/interface/matrix.c.html#MatCreateRedundantMatrix">src/mat/interface/matrix.c</A>
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