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<b>let </b><font color="Maroon">X</font> be    <a href="hidden.html#M1">set</a> ;<br/>

<a NAME="E1:27"/><i><font color="Green">E21</font></i>: 
 <a href="wellord2.html#K1" target="_self">RelIncl</a> <font color="Maroon">X</font> is <a href="relat_2.html#V1">reflexive</a>
 
<b>by </b><i/>;<br/>
<a NAME="E2:27"/>
 <a href="relat_1.html#K3">field</a> <span class="p1">(<span class="default"><a href="wellord2.html#K1" target="_self">RelIncl</a> <font color="Maroon">X</font></span>)</span> <a href="hidden.html#R1">=</a> <font color="Maroon">X</font>
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E3:27"/>
 <a href="wellord2.html#K1" target="_self">RelIncl</a> <font color="Maroon">X</font> <a href="relat_2.html#R1">is_reflexive_in</a> <font color="Maroon">X</font>
 <b>by </b><i>, <a class="ref" href="relat_2.html#D9">RELAT_2:def 9</a></i>;<br/>


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