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<div><span class="kw">theorem </span><a NAME="T21"><span class="comment"><font color="firebrick">:: GLIB_013:21</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">G</font> being   <a href="glib_000.html#NM2" title="GLIB_000:NM.2">_Graph</a> holds <br/> ( <font color="Olive" title="b1">G</font> is <font color="Olive" title="b1">G</font> <a href="glib_000.html#K14" title="GLIB_000:func.14">.order()</a>  <a href="glib_013.html#V3" title="GLIB_013:attr.3">-vertex</a>  &amp; <font color="Olive" title="b1">G</font> is <font color="Olive" title="b1">G</font> <a href="glib_000.html#K16" title="GLIB_000:func.16">.size()</a>  <a href="glib_013.html#V4" title="GLIB_013:attr.4">-edge</a>  ) ;<br/></div></div>
