six_time.operat_1_3_14_15_5_3_2_1_4"></a><div class="titlepage"></div>
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<h2><span class="refentrytitle">Function operator-=</span></h2>
<p>boost::posix_time::operator-=</p>
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<h2 xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="refsynopsisdiv-title">Synopsis</h2>
<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="../../date_time