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<b>take </b>
4
;<br/>

<b>thus </b><a NAME="E1:34_2_1"/>
( not 4 is <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">zero</a> &amp; not 4 is <a href="int_2.html#V1" title="INT_2:attr.1">prime</a> )
 <b>by </b><i><a class="ref" href="int_2.html#T46" target="_self" title="INT_2:th.46">Th46</a>, <a class="ref" href="xcmplx_0.html#D3" title="XCMPLX_0:def.3">XCMPLX_0:def 3</a></i>;<br/>


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