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<a NAME="E1:12_1_1"/>
<font color="Maroon">x</font> <a href="trees_4.html#K5">-tree</a> <font color="Maroon">T1</font> <a href="hidden.html#R1">=</a> <font color="Maroon">x</font> <a href="trees_4.html#K4">-tree</a> <span class="p1"><a href="finseq_1.html#K9">&lt;*</a><span class="default"><font color="Maroon">T1</font></span><a href="finseq_1.html#K9">*&gt;</a></span>
 
<b>by </b><i><a class="ref" href="trees_4.html#D5">TREES_4:def 5</a></i>;<br/>
<b>hence </b><a NAME="E2:12_1_1"/>
not <font color="Maroon">x</font> <a href="trees_4.html#K5">-tree</a> <font color="Maroon">T1</font> is <a href="trees_9.html#V1">root</a>
 ;<br/>


</div>
