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<div class="add">

<b>take </b>
0
;<br/>

<a NAME="E1:1_2_1"/>
0 <a href="hidden.html#R1">=</a> 2 <a href="nat_1.html#K2">*</a> 0
 
;<br/>
<b>hence </b><a NAME="E2:1_2_1"/>
( 0 is <a href="abian.html#V1">even</a> &amp; 0 is <a href="ordinal1.html#V7">natural</a> )
 <b>by </b><i><a class="ref" href="abian.html#D1">ABIAN:def 1</a></i>;<br/>


</div>
