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<b>let </b><font color="Maroon">X</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">R</font> be  <a href="relat_2.html#V1">reflexive</a> <a href="partfun1.html#V1">total</a> <a href="relset_1.html#NM3">Relation</a> of <font color="Maroon">X</font>;<br/>



<a NAME="E1:8"/>
 <a href="relat_1.html#K3">field</a> <font color="Maroon">R</font> <a href="hidden.html#R1">=</a> <font color="Maroon">X</font>
 
<b>by </b><i><a class="ref" href="orders_1.html#T97">ORDERS_1:97</a></i>;<br/>
<b>hence </b><a NAME="E2:8"/>
 <a href="partfun1.html#K6">id</a> <font color="Maroon">X</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">R</font>
 <b>by </b><i><a class="ref" href="relat_2.html#T17">RELAT_2:17</a></i>;<br/>


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