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<b>let </b><font color="Maroon">n</font> be   <a href="nat_1.html#NM1">Nat</a>;<br/>

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( <font color="Maroon">n</font> <a href="hidden.html#R1">=</a> 0 or <font color="Maroon">n</font> <a href="xxreal_0.html#NR4" target="_self">&gt;</a> 0 )
 
;<br/>
<b>hence </b><a NAME="E2:74"/>
0 <a href="hidden.html#R1">=</a> 0 <a href="nat_1.html#K6" target="_self">mod</a> <font color="Maroon">n</font>
 <b>by </b><i>, </i>;<br/>


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