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<div><span class="kw">theorem </span><a NAME="T21"><span class="comment"><font color="firebrick">:: GLIB_000:21</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">G</font> being   non  <a href="glib_000.html#V4" title="GLIB_000:attr.4">_trivial</a>  <a href="glib_000.html#NM2" title="GLIB_000:NM.2">_Graph</a>  ex <font color="Olive" title="b2">v1</font>, <font color="Olive" title="b3">v2</font> being   <a href="glib_000.html#NM10" title="GLIB_000:NM.10">Vertex</a> of <font color="Olive" title="b1">G</font> st <font color="Olive" title="b2">v1</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a> <font color="Olive" title="b3">v2</font></div></div>
