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<div><span class="kw">theorem </span><a NAME="T25"><span class="comment"><font color="firebrick">:: TREES_1:25</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">T</font>, <font color="Olive" title="b2">T1</font> being   <a href="trees_1.html#NM1" title="TREES_1:NM.1">Tree</a> holds  <font color="Olive" title="b1">T</font> <a href="xboole_0.html#K3" title="XBOOLE_0:func.3">/\</a> <font color="Olive" title="b2">T1</font> is   <a href="trees_1.html#NM1" title="TREES_1:NM.1">Tree</a> ;<br/></div></div>
