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<b>reconsider </b><font color="Maroon">R</font> =  <a href="xboole_0.html#K1">{}</a>  as   <a href="relset_1.html#NM3">Relation</a> of  <a href="xboole_0.html#K1">{}</a>  <b>by </b><i><a class="ref" href="relset_1.html#T25">RELSET_1:25</a></i>;<br/>
<a NAME="E2:31"/>
<font color="Maroon">R</font> <a href="relat_2.html#R1">is_reflexive_in</a>  <a href="xboole_0.html#K1">{}</a> 
 
<b>by </b><i><a class="ref" href="relat_1.html#T63">RELAT_1:63</a>, <a class="ref" href="relat_2.html#D9">RELAT_2:def 9</a>, <a class="ref" href="toler_1.html#T2">TOLER_1:2</a></i>;<br/>
<a NAME="E3:31"/><b>then </b>
(  <a href="relset_1.html#K4">dom</a> <font color="Maroon">R</font> <a href="hidden.html#R1">=</a>  <a href="xboole_0.html#K1">{}</a>  &amp;  <a href="relat_1.html#K3">field</a> <font color="Maroon">R</font> <a href="hidden.html#R1">=</a>  <a href="xboole_0.html#K1">{}</a>  )
 
<b>by </b><i><a class="ref" href="orders_1.html#T98">ORDERS_1:98</a></i>;<br/>
<b>hence </b><a NAME="E4:31"/>
 <a href="xboole_0.html#K1">{}</a>  is   <a href="eqrel_1.html#NM2">Equivalence_Relation</a> of  <a href="xboole_0.html#K1">{}</a> 
 <b>by </b><i><a class="ref" href="partfun1.html#D4">PARTFUN1:def 4</a>, <a class="ref" href="toler_1.html#T3">TOLER_1:3</a>, <a class="ref" href="toler_1.html#T9">TOLER_1:9</a></i>;<br/>


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