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<B> Next:</B> <A NAME="tex2html1179"
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HREF="node74.html">psb_cdasb Communication</A>
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<B> Up:</B> <A NAME="tex2html1175"
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HREF="node71.html">Data management routines</A>
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<B> Previous:</B> <A NAME="tex2html1169"
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HREF="node72.html">psb_cdall Allocates</A>
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<B> <A NAME="tex2html1177"
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HREF="node1.html">Contents</A></B>
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<!--End of Navigation Panel-->
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<H2><A NAME="SECTION00072000000000000000">
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psb_cdins -- Communication descriptor insert
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routine</A>
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</H2>
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<P>
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<PRE>
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call psb_cdins(nz, ia, ja, desc_a, info [,ila,jla])
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call psb_cdins(nz,ja,desc,info[,jla,mask,lidx])
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</PRE>
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<P>
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This subroutine examines the edges of the graph associated with the
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discretization mesh (and isomorphic to the sparsity pattern of a
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linear system coefficient matrix), storing them as necessary into the
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communication descriptor. In the first form the edges are specified as
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pairs of indices <SPAN CLASS="MATH"><IMG
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WIDTH="76" HEIGHT="32" ALIGN="MIDDLE" BORDER="0"
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SRC="img102.png"
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ALT="$ia(i),ja(i)$"></SPAN>; the starting index <SPAN CLASS="MATH"><IMG
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WIDTH="36" HEIGHT="32" ALIGN="MIDDLE" BORDER="0"
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SRC="img103.png"
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ALT="$ia(i)$"></SPAN> should
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belong to the current process.
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In the second form only the remote indices <SPAN CLASS="MATH"><IMG
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WIDTH="37" HEIGHT="32" ALIGN="MIDDLE" BORDER="0"
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SRC="img104.png"
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ALT="$ja(i)$"></SPAN> are specified.
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<P>
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<DL>
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<DT><STRONG>Type:</STRONG></DT>
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<DD>Asynchronous.
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</DD>
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<DT><STRONG><B>On Entry</B></STRONG></DT>
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<DD>
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</DD>
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<DT><STRONG>nz</STRONG></DT>
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<DD>the number of points being inserted.
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<BR>
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Scope: <B>local</B>.
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<BR>
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Type: <B>required</B>.
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<BR>
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Intent: <B>in</B>.
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<BR>
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Specified as: an integer value.
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</DD>
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<DT><STRONG>ia</STRONG></DT>
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<DD>the indices of the starting vertex of the edges being inserted.
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<BR>
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Scope: <B>local</B>.
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<BR>
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Type: <B>required</B>.
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<BR>
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Intent: <B>in</B>.
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<BR>
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Specified as: an integer array of length <SPAN CLASS="MATH"><IMG
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WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
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SRC="img105.png"
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ALT="$nz$"></SPAN>.
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</DD>
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<DT><STRONG>ja</STRONG></DT>
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<DD>the indices of the end vertex of the edges being inserted.
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<BR>
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Scope: <B>local</B>.
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<BR>
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Type: <B>required</B>.
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<BR>
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Intent: <B>in</B>.
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<BR>
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Specified as: an integer array of length <SPAN CLASS="MATH"><IMG
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WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
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SRC="img105.png"
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ALT="$nz$"></SPAN>.
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</DD>
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<DT><STRONG>mask</STRONG></DT>
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<DD>Mask entries in <code>ja</code>, they are inserted only when the
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corresponding <code>mask</code> entries are <code>.true.</code>
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<BR>
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Scope: <B>local</B>.
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<BR>
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Type: <B>optional</B>.
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<BR>
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Intent: <B>in</B>.
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<BR>
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Specified as: a logical array of length <SPAN CLASS="MATH"><IMG
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WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
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SRC="img105.png"
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ALT="$nz$"></SPAN>, default <code>.true.</code>.
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</DD>
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<DT><STRONG>lidx</STRONG></DT>
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<DD>User defined local indices for <code>ja</code>.
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<BR>
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Scope: <B>local</B>.
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<BR>
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Type: <B>optional</B>.
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<BR>
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Intent: <B>in</B>.
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<BR>
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Specified as: an integer array of length <SPAN CLASS="MATH"><IMG
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WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
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SRC="img105.png"
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ALT="$nz$"></SPAN>.
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</DD>
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</DL>
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<P>
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<DL>
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<DT><STRONG><B>On Return</B></STRONG></DT>
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<DD>
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</DD>
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<DT><STRONG>desc_a</STRONG></DT>
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<DD>the updated communication descriptor.
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<BR>
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Scope:<B>local</B>.
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<BR>
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Type:<B>required</B>.
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<BR>
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Intent: <B>inout</B>.
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<BR>
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Specified as: a structured data of type descdata<TT>psb_desc_type</TT>.
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</DD>
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<DT><STRONG>info</STRONG></DT>
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<DD>Error code.
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<BR>
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Scope: <B>local</B>
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<BR>
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Type: <B>required</B>
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<BR>
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Intent: <B>out</B>.
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<BR>
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An integer value; 0 means no error has been detected.
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</DD>
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<DT><STRONG>ila</STRONG></DT>
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<DD>the local indices of the starting vertex of the edges being inserted.
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<BR>
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Scope: <B>local</B>.
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<BR>
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Type: <B>optional</B>.
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<BR>
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Intent: <B>out</B>.
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<BR>
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Specified as: an integer array of length <SPAN CLASS="MATH"><IMG
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WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
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SRC="img105.png"
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ALT="$nz$"></SPAN>.
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</DD>
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<DT><STRONG>jla</STRONG></DT>
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<DD>the local indices of the end vertex of the edges being inserted.
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<BR>
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Scope: <B>local</B>.
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<BR>
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Type: <B>optional</B>.
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<BR>
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Intent: <B>out</B>.
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<BR>
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Specified as: an integer array of length <SPAN CLASS="MATH"><IMG
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WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
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SRC="img105.png"
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ALT="$nz$"></SPAN>.
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<P>
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</DD>
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</DL>
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<BIG CLASS="LARGE"><B>Notes</B></BIG>
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<OL>
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<LI>This routine may only be called if the descriptor is in the
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build state;
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</LI>
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<LI>This routine automatically ignores edges that do not
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insist on the current process, i.e. edges for which neither the starting
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nor the end vertex belong to the current process.
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</LI>
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<LI>The second form of this routine will be useful when dealing with
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user-specified index mappings; see also <A HREF="node7.html#sec:usermaps">2.3.1</A>.
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</LI>
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</OL>
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<B> Next:</B> <A NAME="tex2html1179"
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HREF="node74.html">psb_cdasb Communication</A>
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<B> Up:</B> <A NAME="tex2html1175"
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HREF="node71.html">Data management routines</A>
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HREF="node72.html">psb_cdall Allocates</A>
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<B> <A NAME="tex2html1177"
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HREF="node1.html">Contents</A></B> </DIV>
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