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<a NAME="E1:16_1_1"/>
 <a href="relat_1.html#K1">dom</a> <span class="p1">(<span class="default"><a href="trees_4.html#K1">root-tree</a> <font color="Maroon">x</font></span>)</span> <a href="hidden.html#R1">=</a>  <a href="trees_1.html#K2">elementary_tree</a> 0
 
<b>by </b><i><a class="ref" href="trees_4.html#T3">TREES_4:3</a></i>;<br/>
<b>hence </b><a NAME="E2:16_1_1"/>
(  <a href="trees_4.html#K1">root-tree</a> <font color="Maroon">x</font> is <a href="finset_1.html#V1">finite</a> &amp;  <a href="trees_4.html#K1">root-tree</a> <font color="Maroon">x</font> is <a href="trees_9.html#V1" target="_self">root</a> )
 <b>by </b><i/>;<br/>


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