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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E24">Th20</font></span>: <a NAME="T20"><span class="comment"><font color="firebrick">:: ARYTM_3:20</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">a</font>, <font color="Olive" title="b2">b</font> being   <a href="ordinal1.html#V7" title="ORDINAL1:attr.7">natural</a>  <a href="ordinal1.html#NM3" title="ORDINAL1:NM.3">Ordinal</a> holds <br/> ( <font color="Olive" title="b1">a</font>,<font color="Olive" title="b2">b</font> <a href="arytm_3.html#R1" title="ARYTM_3:pred.1">are_coprime</a>  iff <font color="Olive" title="b1">a</font> <a href="arytm_3.html#K3" title="ARYTM_3:func.3">hcf</a> <font color="Olive" title="b2">b</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> 1 )</div></div>
