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<a NAME="E1:65_1_1"/>
(  <a href="relat_1.html#K1">dom</a> <span class="p1">(<span class="default"><font color="Maroon">W</font> <a href="funcop_1.html#K2">--&gt;</a> <font color="Maroon">d</font></span>)</span> <a href="hidden.html#R1">=</a> <font color="Maroon">W</font> &amp;  <a href="relat_1.html#K2">rng</a> <span class="p1">(<span class="default"><font color="Maroon">W</font> <a href="funcop_1.html#K2">--&gt;</a> <font color="Maroon">d</font></span>)</span> <a href="tarski.html#R1">c=</a> <span class="p1"><a href="tarski.html#K1">{</a><span class="default"><font color="Maroon">d</font></span><a href="tarski.html#K1">}</a></span> &amp; <span class="p1"><a href="tarski.html#K1">{</a><span class="default"><font color="Maroon">d</font></span><a href="tarski.html#K1">}</a></span> <a href="tarski.html#R1">c=</a> <font color="Maroon">D</font> )
 
<b>by </b><i><a class="ref" href="funcop_1.html#T19">FUNCOP_1:19</a>, <a class="ref" href="zfmisc_1.html#T37">ZFMISC_1:37</a></i>;<br/>
<a NAME="E2:65_1_1"/><b>then </b>
( <font color="Maroon">W</font> <a href="funcop_1.html#K2">--&gt;</a> <font color="Maroon">d</font> is   <a href="trees_2.html#NM4">DecoratedTree</a> &amp;  <a href="relat_1.html#K2">rng</a> <span class="p1">(<span class="default"><font color="Maroon">W</font> <a href="funcop_1.html#K2">--&gt;</a> <font color="Maroon">d</font></span>)</span> <a href="tarski.html#R1">c=</a> <font color="Maroon">D</font> )
 
<b>by </b><i><a class="ref" href="xboole_1.html#T1">XBOOLE_1:1</a></i>;<br/>
<b>hence </b><a NAME="E3:65_1_1"/>
<font color="Maroon">W</font> <a href="funcop_1.html#K2">--&gt;</a> <font color="Maroon">d</font> is   <a href="trees_2.html#NM6">DecoratedTree</a> of <font color="Maroon">D</font>
 <b>by </b><i/>;<br/>


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