<?xml version="1.0"?>
<div>:: <span class="kw">deftheorem </span>   defines <a href="trees_a.html#K4" title="TREES_A:func.4">tree</a> <a onclick="hs(this)" href="javascript:()">TREES_A:def 3 : <br/></a><span> for <font color="Olive" title="b1">D</font> being   non  <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>   <a href="hidden.html#M2" title="HIDDEN:mode.2">set</a> <br/>  for <font color="Olive" title="b2">T</font> being   <a href="trees_2.html#NM5" title="TREES_2:NM.5">DecoratedTree</a> of <font color="Olive" title="b1">D</font><br/>  for <font color="Olive" title="b3">P</font> being    <a href="trees_1.html#M4" title="TREES_1:mode.4">AntiChain_of_Prefixes</a> of  <a href="relat_1.html#NK1" title="RELAT_1:NK.1">dom</a> <font color="Olive" title="b2">T</font><br/>  for <font color="Olive" title="b4">T1</font> being   <a href="trees_2.html#NM5" title="TREES_2:NM.5">DecoratedTree</a> of <font color="Olive" title="b1">D</font>  st <font color="Olive" title="b3">P</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a>  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  holds <br/> <a href="trees_a.html#K4" title="TREES_A:func.4">tree</a> (<font color="Olive" title="b2">T</font>,<font color="Olive" title="b3">P</font>,<font color="Olive" title="b4">T1</font>) <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="trees_a.html#K3" title="TREES_A:func.3">tree</a> (<font color="Olive" title="b2">T</font>,<font color="Olive" title="b3">P</font>,<font color="Olive" title="b4">T1</font>);<br/></span></div>
