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<b>let </b><font color="Maroon" title="c1">T</font> be  non <a href="struct_0.html#V2" title="STRUCT_0:attr.2">empty</a>  <a href="orders_2.html#L1" title="ORDERS_2:struct.1">RelStr</a> ;<br/><b>let </b><font color="Maroon" title="c2">A</font>, <font color="Maroon" title="c3">B</font> be   <a href="struct_0.html#NM2" title="STRUCT_0:NM.2">Subset</a> of <font color="Maroon" title="c1">T</font>;<br/><b>let </b><font color="Maroon" title="c4">n</font> be    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of  <a href="numbers.html#K5" title="NUMBERS:func.5">NAT</a> ;<br/>







<span class="p1">(<span class="default"><a href="fintopo3.html#K9" title="FINTOPO3:func.9">Fdfl</a> <font color="Maroon" title="c2">A</font>,<font color="Maroon" title="c4">n</font></span>)</span> <a href="subset_1.html#K9" title="SUBSET_1:func.9">/\</a> <span class="p1">(<span class="default"><a href="fintopo3.html#K9" title="FINTOPO3:func.9">Fdfl</a> <font color="Maroon" title="c3">B</font>,<font color="Maroon" title="c4">n</font></span>)</span> = 
 <a href="fintopo3.html#K9" title="FINTOPO3:func.9">Fdfl</a> <span class="p1">(<span class="default"><font color="Maroon" title="c2">A</font> <a href="subset_1.html#K9" title="SUBSET_1:func.9">/\</a> <font color="Maroon" title="c3">B</font></span>)</span>,<font color="Maroon" title="c4">n</font>
<b>by </b><i><a class="ref" href="fintopo3.html#T42" target="_self" title="FINTOPO3:th.42">Th42</a></i>
<br/>.= 
<span class="p1">(<span class="default"><a href="fintopo3.html#K7" title="FINTOPO3:func.7">Finf</a> <span class="p2">(<span class="default"><span class="p3">(<span class="default"><font color="Maroon" title="c2">A</font> <a href="subset_1.html#K9" title="SUBSET_1:func.9">/\</a> <font color="Maroon" title="c3">B</font></span>)</span> <a href="subset_1.html#K3" title="SUBSET_1:func.3">`</a> </span>)</span>,<font color="Maroon" title="c4">n</font></span>)</span> <a href="subset_1.html#K3" title="SUBSET_1:func.3">`</a> 
<b>by </b><i><a class="ref" href="fintopo3.html#T45" target="_self" title="FINTOPO3:th.45">Th45</a></i>
;<br/>
<b>hence </b><a NAME="E2:47"/>
<span class="p1">(<span class="default"><a href="fintopo3.html#K9" title="FINTOPO3:func.9">Fdfl</a> <font color="Maroon" title="c2">A</font>,<font color="Maroon" title="c4">n</font></span>)</span> <a href="subset_1.html#K9" title="SUBSET_1:func.9">/\</a> <span class="p1">(<span class="default"><a href="fintopo3.html#K9" title="FINTOPO3:func.9">Fdfl</a> <font color="Maroon" title="c3">B</font>,<font color="Maroon" title="c4">n</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><a href="fintopo3.html#K7" title="FINTOPO3:func.7">Finf</a> <span class="p2">(<span class="default"><span class="p3">(<span class="default"><font color="Maroon" title="c2">A</font> <a href="subset_1.html#K9" title="SUBSET_1:func.9">/\</a> <font color="Maroon" title="c3">B</font></span>)</span> <a href="subset_1.html#K3" title="SUBSET_1:func.3">`</a> </span>)</span>,<font color="Maroon" title="c4">n</font></span>)</span> <a href="subset_1.html#K3" title="SUBSET_1:func.3">`</a> 
 ;<br/>


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