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  29 <h2><span class="refentrytitle">Function operator|</span></h2>
  30 <p>boost::mpi::operator| &#8212; Computes the union of two process groups. </p>
  31 </div>
  32 <h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
  33 <div xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv"><pre class="synopsis"><span class="comment">// In header: &lt;<a class="link" href="../../mpi/reference.html#header.boost.mpi.group_hpp" title="Header &lt;boost/mpi/group.hpp&gt;">boost/mpi/group.hpp</a>&gt;
  34
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  36 <span class="identifier">BOOST_MPI_DECL</span> <a class="link" href="group.html" title="Class group">group</a> <span class="keyword">operator</span><span class="special">|</span><span class="special">(</span><span class="keyword">const</span> <a class="link" href="group.html" title="Class group">group</a> <span class="special">&amp;</span> g1<span class="special">,</span> <span class="keyword">const</span> <a class="link" href="group.html" title="Class group">group</a> <span class="special">&amp;</span> g2<span class="special">)</span><span class="special">;</span></pre></div>
  37 <div class="refsect1">
  38 <a name="idp421072800"></a><h2>Description</h2>
  39 <p>This routine returns a new <code class="computeroutput">group</code> that contains all processes that are either in group <code class="computeroutput">g1</code> or in group <code class="computeroutput">g2</code> (or both). The processes that are in <code class="computeroutput">g1</code> will be first in the resulting group, followed by the processes from <code class="computeroutput">g2</code> (but not also in <code class="computeroutput">g1</code>). Equivalent to <code class="computeroutput">MPI_Group_union</code>. </p>
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  44 <td align="right"><div class="copyright-footer">Copyright &#169; 2005-2007 Douglas Gregor,
  45       Matthias Troyer, Trustees of Indiana University<p>
  46         Distributed under the Boost Software License, Version 1.0. (See accompanying
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