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<a NAME="E1:18_1_1"/>
 <a href="oposet_1.html#K1" target="_self">{}</a> <font color="Maroon">X</font>,<font color="Maroon">X</font> <a href="hidden.html#R1">=</a>  <a href="xboole_0.html#K1">{}</a> 
 
;<br/>
<b>hence </b><a NAME="E2:18_1_1"/>
 ex <font color="Olive">b<sub>1</sub></font> being  <a href="relset_1.html#NM3">Relation</a> of <font color="Maroon">X</font> st <br/>( <font color="Olive">b<sub>1</sub></font> is <a href="relat_2.html#V2">irreflexive</a> &amp; <font color="Olive">b<sub>1</sub></font> is <a href="relat_2.html#V5">asymmetric</a> &amp; <font color="Olive">b<sub>1</sub></font> is <a href="relat_2.html#V8">transitive</a> )
 <b>by </b><i><a class="ref" href="toler_1.html#T4">TOLER_1:4</a>, <a class="ref" href="toler_1.html#T6">TOLER_1:6</a>, <a class="ref" href="toler_1.html#T9">TOLER_1:9</a></i>;<br/>


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