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<b>let </b><font color="Maroon" title="c1">m</font>, <font color="Maroon" title="c2">n</font> be  <a href="ordinal1.html#V7" title="ORDINAL1:attr.7">natural</a>  <a href="ordinal1.html#NM1" title="ORDINAL1:NM.1">number</a> ;<br/>



<b>assume </b><a NAME="E1:38"/><i><font color="Green" title="E28">A1</font></i>: 
( not <font color="Maroon" title="c1">m</font> is <a href="moebius1.html#V1" title="MOEBIUS1:attr.1">square-containing</a> &amp; <font color="Maroon" title="c2">n</font> <a href="nat_d.html#R1" title="NAT_D:pred.1">divides</a> <font color="Maroon" title="c1">m</font> )
 ;<br/>

<a NAME="E2:38"/><b>then </b>
 ex <font color="Olive" title="b1">x</font> being  <a href="nat_1.html#NM1" title="NAT_1:NM.1">Nat</a> st <font color="Maroon" title="c1">m</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c2">n</font> <a href="xcmplx_0.html#K3" title="XCMPLX_0:func.3">*</a> <font color="Olive" title="b1">x</font>
 
<b>by </b><i><a class="ref" href="nat_d.html#D3" title="NAT_D:def.3">NAT_D:def 3</a></i>;<br/>
<b>hence </b><a NAME="E3:38"/>
not <font color="Maroon" title="c2">n</font> is <a href="moebius1.html#V1" title="MOEBIUS1:attr.1">square-containing</a>
 <b>by </b><i><a class="txt" href="moebius1.html#E1:38"><i><font color="Green" title="E28">A1</font></i></a>, <a class="ref" href="moebius1.html#T25" target="_self" title="MOEBIUS1:th.25">Th25</a></i>;<br/>


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