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<b>let </b><font color="Maroon" title="c1">a</font>, <font color="Maroon" title="c2">b</font> be  <a href="ordinal1.html#V7" title="ORDINAL1:attr.7">natural</a> <a href="ordinal1.html#NM2" title="ORDINAL1:NM.2">Ordinal</a>;<br/>



<b>assume </b><a NAME="E1:40"/>
<font color="Maroon" title="c1">a</font>,<font color="Maroon" title="c2">b</font> <a href="arytm_3.html#R1" title="ARYTM_3:pred.1">are_relative_prime</a> 
 ;<br/>

<a NAME="E2:40"/><b>then </b>
<font color="Maroon" title="c1">a</font> <a href="arytm_3.html#K5" title="ARYTM_3:func.5">hcf</a> <font color="Maroon" title="c2">b</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> 1
 
<b>by </b><i><a class="ref" href="arytm_3.html#T25" target="_self" title="ARYTM_3:th.25">Th25</a></i>;<br/>
<b>hence </b><a NAME="E3:40"/>
 <a href="arytm_3.html#K6" title="ARYTM_3:func.6">RED</a> <font color="Maroon" title="c1">a</font>,<font color="Maroon" title="c2">b</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c1">a</font>
 <b>by </b><i><a class="ref" href="ordinal3.html#T84" title="ORDINAL3:th.84">ORDINAL3:84</a></i>;<br/>


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