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invoke_procedure</title>
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<a accesskey="p" href="invoke.html"><img src="../../../../images/prev.png" alt="Prev"></a><a accesskey="u" href="../functions.html"><img src="../../../../images/up.png" alt="Up"></a><a accesskey="h" href="../../../../index.html"><img src="../../../../images/home.png" alt="Home"></a><a accesskey="n" href="invoke_fobj.html"><img src="../../../../images/next.png" alt="Next"></a>
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<div class="titlepage"><div><div><h5 class="title">
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<a name="fusion.functional.invocation.functions.invoke_proc"></a><a href="invoke_proc.html" title="
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invoke_procedure">
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invoke_procedure</a></h5></div></div></div>
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<a name="fusion.functional.invocation.functions.invoke_proc.description"></a><h6>
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<a name="id1244068"></a>
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<a href="invoke_proc.html#fusion.functional.invocation.functions.invoke_proc.description">Description</a>
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</h6>
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<p>
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Calls a <a href="../../concepts/callable.html" title=" Callable Object">Callable
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Object</a> with the arguments from a <a href="../../../sequences.html" title="Sequences">Sequence</a>.
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The result of the call is ignored.
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</p>
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<p>
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The first template parameter can be specialized explicitly to avoid copying
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and/or to control the const qualification of a function object.
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</p>
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<p>
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For pointers to class members corresponding object can be specified as
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a reference, pointer, or smart pointer. In case of the latter, a freestanding
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<code class="literal">get_pointer</code> function must be defined (Boost provides
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this function for <code class="literal">std::auto_ptr</code> and <a href="http://www.boost.org/libs/smart_ptr/shared_ptr.htm" target="_top"><code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">shared_ptr</span></code></a>).
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</p>
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<p>
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The target function must not be a pointer to a member object (dereferencing
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such a pointer without returning anything does not make sense, so it
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isn't implemented).
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</p>
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<a name="fusion.functional.invocation.functions.invoke_proc.synopsis"></a><h6>
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<a name="id1244168"></a>
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<a href="invoke_proc.html#fusion.functional.invocation.functions.invoke_proc.synopsis">Synopsis</a>
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</h6>
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<pre class="programlisting">
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<span class="keyword">template</span><span class="special"><</span>
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<span class="keyword">typename</span> <span class="identifier">Function</span><span class="special">,</span>
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<span class="keyword">class</span> <span class="identifier">Sequence</span>
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<span class="special">></span>
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<span class="keyword">typename</span> <a href="../metafunctions/invoke_proc.html" title="
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invoke_procedure"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">invoke_procedure</span></code></a><span class="special"><</span><span class="identifier">Function</span><span class="special">,</span> <span class="identifier">Sequence</span><span class="special">>::</span><span class="identifier">type</span>
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<span class="identifier">invoke_procedure</span><span class="special">(</span><span class="identifier">Function</span> <span class="identifier">f</span><span class="special">,</span> <span class="identifier">Sequence</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">);</span>
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<span class="keyword">template</span><span class="special"><</span>
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<span class="keyword">typename</span> <span class="identifier">Function</span><span class="special">,</span>
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<span class="keyword">class</span> <span class="identifier">Sequence</span>
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<span class="special">></span>
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<span class="keyword">typename</span> <a href="../metafunctions/invoke_proc.html" title="
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invoke_procedure"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">invoke_procedure</span></code></a><span class="special"><</span><span class="identifier">Function</span><span class="special">,</span> <span class="identifier">Sequence</span> <span class="keyword">const</span><span class="special">>::</span><span class="identifier">type</span>
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<span class="identifier">invoke_procedure</span><span class="special">(</span><span class="identifier">Function</span> <span class="identifier">f</span><span class="special">,</span> <span class="identifier">Sequence</span> <span class="keyword">const</span> <span class="special">&</span> <span class="identifier">s</span><span class="special">);</span>
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</pre>
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<a name="fusion.functional.invocation.functions.invoke_proc.parameters"></a><h6>
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<a name="id1244500"></a>
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<a href="invoke_proc.html#fusion.functional.invocation.functions.invoke_proc.parameters">Parameters</a>
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</h6>
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<div class="informaltable"><table class="table">
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<colgroup>
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<col>
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<col>
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<col>
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</colgroup>
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<thead><tr>
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<th>
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<p>
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Parameter
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</p>
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</th>
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<th>
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<p>
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Requirement
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</p>
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</th>
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<th>
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<p>
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Description
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</p>
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</th>
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</tr></thead>
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<tbody>
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<tr>
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<td>
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<p>
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<code class="computeroutput"><span class="identifier">f</span></code>
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</p>
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</td>
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<td>
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<p>
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Model of <a href="../../concepts/callable.html" title=" Callable Object">Callable
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Object</a>
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</p>
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</td>
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<td>
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<p>
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The function to call.
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</p>
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</td>
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</tr>
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<tr>
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<td>
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<p>
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<code class="computeroutput"><span class="identifier">s</span></code>
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</p>
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</td>
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<td>
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<p>
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Model of <a href="../../../sequences/concepts/forward_sequence.html" title="Forward
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Sequence">Forward
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Sequence</a>
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</p>
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</td>
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<td>
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<p>
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The arguments.
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</p>
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</td>
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</tr>
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</tbody>
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</table></div>
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<a name="fusion.functional.invocation.functions.invoke_proc.expression_semantics"></a><h6>
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<a name="id1244645"></a>
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<a href="invoke_proc.html#fusion.functional.invocation.functions.invoke_proc.expression_semantics">Expression
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Semantics</a>
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</h6>
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<pre class="programlisting">
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<span class="identifier">invoke_procedure</span><span class="special">(</span><span class="identifier">f</span><span class="special">,</span><span class="identifier">s</span><span class="special">);</span>
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</pre>
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<p>
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<span class="bold"><strong>Return type</strong></span>: <code class="computeroutput"><span class="keyword">void</span></code>
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</p>
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<p>
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<span class="bold"><strong>Semantics</strong></span>: Invokes <code class="computeroutput"><span class="identifier">f</span></code>
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with the elements in <code class="computeroutput"><span class="identifier">s</span></code>
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as arguments.
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</p>
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<a name="fusion.functional.invocation.functions.invoke_proc.header"></a><h6>
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<a name="id1244753"></a>
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<a href="invoke_proc.html#fusion.functional.invocation.functions.invoke_proc.header">Header</a>
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</h6>
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<pre class="programlisting">
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<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">fusion</span><span class="special">/</span><span class="identifier">functional</span><span class="special">/</span><span class="identifier">invocation</span><span class="special">/</span><span class="identifier">invoke_procedure</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
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</pre>
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<a name="fusion.functional.invocation.functions.invoke_proc.example"></a><h6>
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<a name="id1244847"></a>
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<a href="invoke_proc.html#fusion.functional.invocation.functions.invoke_proc.example">Example</a>
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</h6>
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<pre class="programlisting">
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<a href="../../../sequences/containers/vector.html" title="vector"><code class="computeroutput"><span class="identifier">vector</span></code></a><span class="special"><</span><span class="keyword">int</span><span class="special">,</span><span class="keyword">int</span><span class="special">></span> <span class="identifier">v</span><span class="special">(</span><span class="number">1</span><span class="special">,</span><span class="number">2</span><span class="special">);</span>
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<span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">lambda</span><span class="special">;</span>
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<span class="identifier">invoke_procedure</span><span class="special">(</span><span class="identifier">_1</span> <span class="special">+=</span> <span class="identifier">_2</span><span class="special">,</span> <span class="identifier">v</span><span class="special">);</span>
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<span class="identifier">assert</span><span class="special">(</span><a href="../../../sequences/intrinsics/functions/front.html" title="front"><code class="computeroutput"><span class="identifier">front</span></code></a><span class="special">(</span><span class="identifier">v</span><span class="special">)</span> <span class="special">==</span> <span class="number">3</span><span class="special">);</span>
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</pre>
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<a name="fusion.functional.invocation.functions.invoke_proc.see_also"></a><h6>
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<a name="id1245059"></a>
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<a href="invoke_proc.html#fusion.functional.invocation.functions.invoke_proc.see_also">See
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also</a>
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</h6>
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<div class="itemizedlist"><ul type="disc">
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<li><a href="invoke.html" title="invoke"><code class="computeroutput"><span class="identifier">invoke</span></code></a></li>
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<li><a href="invoke_fobj.html" title="
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invoke_function_object"><code class="computeroutput"><span class="identifier">invoke_function_object</span></code></a></li>
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<li><a href="../metafunctions/invoke_proc.html" title="
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invoke_procedure"><code class="computeroutput"><span class="identifier">result_of</span><span class="special">::</span><span class="identifier">invoke_procedure</span></code></a></li>
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<li><a href="../../adapters/fused_procedure.html" title="fused_procedure"><code class="computeroutput"><span class="identifier">fused_procedure</span></code></a></li>
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</ul></div>
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</div>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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<td align="left"></td>
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<td align="right"><small>Copyright © 2001-2007 Joel de Guzman, Dan Marsden, Tobias
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Schwinger</small></td>
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