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<b>let </b><font color="Maroon">V</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">C</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">A</font> be    <a href="subset_1.html#M1">Element</a> of  <a href="finsub_1.html#K5">Fin</a> <span class="p1">(<span class="default"><a href="partfun1.html#K4">PFuncs</a> <font color="Maroon">V</font>,<font color="Maroon">C</font></span>)</span>;<br/><b>let </b><font color="Maroon">B</font> be    <a href="subset_1.html#M1">Element</a> of  <a href="finsub_1.html#K5">Fin</a> <span class="p1">(<span class="default"><a href="partfun1.html#K4">PFuncs</a> <font color="Maroon">V</font>,<font color="Maroon">C</font></span>)</span>;<br/><b>let </b><font color="Maroon">D</font> be    <a href="subset_1.html#M1">Element</a> of  <a href="finsub_1.html#K5">Fin</a> <span class="p1">(<span class="default"><a href="partfun1.html#K4">PFuncs</a> <font color="Maroon">V</font>,<font color="Maroon">C</font></span>)</span>;<br/>









<a NAME="E1:29"/>
( <font color="Maroon">D</font> <a href="substlat.html#K4" target="_self">^</a> <font color="Maroon">A</font> <a href="hidden.html#R1">=</a> <font color="Maroon">A</font> <a href="substlat.html#K4" target="_self">^</a> <font color="Maroon">D</font> &amp; <font color="Maroon">D</font> <a href="substlat.html#K4" target="_self">^</a> <font color="Maroon">B</font> <a href="hidden.html#R1">=</a> <font color="Maroon">B</font> <a href="substlat.html#K4" target="_self">^</a> <font color="Maroon">D</font> )
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E2:29"/>
( <font color="Maroon">A</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">B</font> implies <font color="Maroon">D</font> <a href="substlat.html#K4" target="_self">^</a> <font color="Maroon">A</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">D</font> <a href="substlat.html#K4" target="_self">^</a> <font color="Maroon">B</font> )
 <b>by </b><i/>;<br/>


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