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<span class="kw">consider </span><font color="Maroon" title="c2">d</font> being    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <font color="Maroon" title="c1">D</font>;<br/>
<span class="kw">reconsider </span><font color="Maroon" title="c3">T</font> = <span class="p1"><a href="tarski.html#K1" title="TARSKI:func.1">{</a><span class="default"><a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a> </span><a href="tarski.html#K1" title="TARSKI:func.1">}</a></span> as   <a href="trees_1.html#NM1" title="TREES_1:NM.1">Tree</a> <span class="kw">by</span> <span class="lab"><a class="ref" href="trees_1.html#T48" title="TREES_1:th.48">TREES_1:48</a></span>;<br/>
<span class="kw">take </span>
<font color="Maroon" title="c3">T</font> <a href="trees_2.html#K9" title="TREES_2:func.9">--&gt;</a> <font color="Maroon" title="c2">d</font>
; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="Red">::  thesis: </font></span></a><span class="hide"> <font color="Maroon" title="c3">T</font> <a href="trees_2.html#K9" title="TREES_2:func.9">--&gt;</a> <font color="Maroon" title="c2">d</font> is  <a href="finset_1.html#V1" title="FINSET_1:attr.1">finite</a> </span><br/>

<a NAME="E3:76_1_1"/><span class="lab"><font color="Green" title="E34">A1</font></span>: 
 <a href="relat_1.html#NK2" title="RELAT_1:NK.2">dom</a> <span class="p1">(<span class="default"><font color="Maroon" title="c3">T</font> <a href="trees_2.html#K9" title="TREES_2:func.9">--&gt;</a> <font color="Maroon" title="c2">d</font></span>)</span> is  <a href="finset_1.html#V1" title="FINSET_1:attr.1">finite</a> 
 
<span class="kw">by</span> <span class="lab"><a class="ref" href="funcop_1.html#T19" title="FUNCOP_1:th.19">FUNCOP_1:19</a></span>;<br/>
<span class="kw">thus </span><a NAME="E4:76_1_1"/>
<font color="Maroon" title="c3">T</font> <a href="trees_2.html#K9" title="TREES_2:func.9">--&gt;</a> <font color="Maroon" title="c2">d</font> is  <a href="finset_1.html#V1" title="FINSET_1:attr.1">finite</a> 
 <span class="kw">by</span> <span class="lab"><a class="txt" href="#E3:76_1_1"><span class="lab"><font color="Green" title="E34">A1</font></span></a>, <a class="txt" href="trees_2.html#E53"><span class="lab"><font color="Green" title="E33">Lm2</font></span></a></span>; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="Red">::  thesis: </font></span></a><span class="hide"> verum</span><br/>


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