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<b>let </b><font color="Maroon" title="c1">UN</font> be   <a href="classes2.html#NM1" title="CLASSES2:NM.1">Universe</a>;<br/><b>let </b><font color="Maroon" title="c2">u1</font>, <font color="Maroon" title="c3">u2</font>, <font color="Maroon" title="c4">u3</font>, <font color="Maroon" title="c5">u4</font> be    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <font color="Maroon" title="c1">UN</font>;<br/>



<a NAME="E1:2"/><i><font color="Green" title="E3">A1</font></i>: 
<span class="p1"><a href="domain_1.html#K4" title="DOMAIN_1:func.4">[</a><span class="default"><font color="Maroon" title="c2">u1</font>,<font color="Maroon" title="c3">u2</font>,<font color="Maroon" title="c4">u3</font></span><a href="domain_1.html#K4" title="DOMAIN_1:func.4">]</a></span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="classes2.html#K6" title="CLASSES2:func.6">[</a><span class="default"><span class="p2"><a href="classes2.html#K6" title="CLASSES2:func.6">[</a><span class="default"><font color="Maroon" title="c2">u1</font>,<font color="Maroon" title="c3">u2</font></span><a href="classes2.html#K6" title="CLASSES2:func.6">]</a></span>,<font color="Maroon" title="c4">u3</font></span><a href="classes2.html#K6" title="CLASSES2:func.6">]</a></span>
 
<b>by </b><i><a class="ref" href="mcart_1.html#D3" title="MCART_1:def.3">MCART_1:def 3</a></i>;<br/>
<a NAME="E2:2"/>
<span class="p1"><a href="domain_1.html#K5" title="DOMAIN_1:func.5">[</a><span class="default"><font color="Maroon" title="c2">u1</font>,<font color="Maroon" title="c3">u2</font>,<font color="Maroon" title="c4">u3</font>,<font color="Maroon" title="c5">u4</font></span><a href="domain_1.html#K5" title="DOMAIN_1:func.5">]</a></span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1"><a href="domain_1.html#K1" title="DOMAIN_1:func.1">[</a><span class="default"><span class="p2"><a href="domain_1.html#K4" title="DOMAIN_1:func.4">[</a><span class="default"><font color="Maroon" title="c2">u1</font>,<font color="Maroon" title="c3">u2</font>,<font color="Maroon" title="c4">u3</font></span><a href="domain_1.html#K4" title="DOMAIN_1:func.4">]</a></span>,<font color="Maroon" title="c5">u4</font></span><a href="domain_1.html#K1" title="DOMAIN_1:func.1">]</a></span>
 
<b>by </b><i><a class="ref" href="mcart_1.html#D4" title="MCART_1:def.4">MCART_1:def 4</a></i>;<br/>
<b>hence </b><a NAME="E3:2"/>
( <span class="p1"><a href="domain_1.html#K4" title="DOMAIN_1:func.4">[</a><span class="default"><font color="Maroon" title="c2">u1</font>,<font color="Maroon" title="c3">u2</font>,<font color="Maroon" title="c4">u3</font></span><a href="domain_1.html#K4" title="DOMAIN_1:func.4">]</a></span> is    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <font color="Maroon" title="c1">UN</font> &amp; <span class="p1"><a href="domain_1.html#K5" title="DOMAIN_1:func.5">[</a><span class="default"><font color="Maroon" title="c2">u1</font>,<font color="Maroon" title="c3">u2</font>,<font color="Maroon" title="c4">u3</font>,<font color="Maroon" title="c5">u4</font></span><a href="domain_1.html#K5" title="DOMAIN_1:func.5">]</a></span> is    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of <font color="Maroon" title="c1">UN</font> )
 <b>by </b><i><a class="txt" href="grcat_1.html#E1:2"><i><font color="Green" title="E3">A1</font></i></a>, <a class="ref" href="classes2.html#T64" title="CLASSES2:th.64">CLASSES2:64</a></i>;<br/>


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