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<b>consider </b><font color="Maroon" title="c2">T</font> being  <a href="finset_1.html#V1" title="FINSET_1:attr.1">finite</a> <a href="trees_1.html#NM1" title="TREES_1:NM.1">Tree</a>;<br/>
<b>consider </b><font color="Maroon" title="c3">t</font> being   <a href="funct_2.html#NM1" title="FUNCT_2:NM.1">Function</a> of <font color="Maroon" title="c2">T</font>,<font color="Maroon" title="c1">D</font>;<br/>
<a NAME="E3:48_1_1"/><i><font color="Green" title="E20">A1</font></i>: 
<font color="Maroon" title="c3">t</font> is    <a href="trees_3.html#M6" title="TREES_3:mode.6">Relation</a> of <font color="Maroon" title="c2">T</font>,<font color="Maroon" title="c1">D</font>
 
;<br/>
<a NAME="E4:48_1_1"/><b>then </b>
(  <a href="relset_1.html#K4" title="RELSET_1:func.4">dom</a> <font color="Maroon" title="c3">t</font> is <a href="finset_1.html#V1" title="FINSET_1:attr.1">finite</a> &amp; <font color="Maroon" title="c3">t</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a>  <a href="trees_3.html#K4" title="TREES_3:func.4">Trees</a> <font color="Maroon" title="c1">D</font> )
 
<b>by </b><i><a class="ref" href="trees_3.html#D7" target="_self" title="TREES_3:def.7">Def7</a></i>;<br/>
<b>hence </b><a NAME="E5:48_1_1"/>
not  <a href="trees_3.html#K5" title="TREES_3:func.5">FinTrees</a> <font color="Maroon" title="c1">D</font> is <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>
 <b>by </b><i><a class="txt" href="trees_3.html#E3:48_1_1"><i><font color="Green" title="E20">A1</font></i></a>, <a class="ref" href="trees_3.html#D8" target="_self" title="TREES_3:def.8">Def8</a></i>; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> verum</span><br/>


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