<?xml version="1.0"?>
<div class="add">

<b>let </b><font color="Maroon">m</font> be  <a href="ordinal1.html#V7">natural</a> <a href="ordinal1.html#NM2">Ordinal</a>;<br/><b>let </b><font color="Maroon">n</font> be  <a href="ordinal1.html#V7">natural</a> <a href="ordinal1.html#NM2">Ordinal</a>;<br/>



<b>assume </b><a NAME="E1:21"/>
 <a href="xboole_0.html#K1">{}</a>  <a href="hidden.html#R2">in</a> <font color="Maroon">m</font>
 ;<br/>

<b>then consider </b><font color="Maroon">C</font> being   <a href="ordinal1.html#NM2">Ordinal</a><b> such that </b><br/><a NAME="E3:21"/><i><font color="Green">E13</font></i>: 
( <font color="Maroon">n</font> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">n</font> <a href="ordinal3.html#K6">div^</a> <font color="Maroon">m</font></span>)</span> <a href="arytm_3.html#K3" target="_self">*^</a> <font color="Maroon">m</font></span>)</span> <a href="ordinal2.html#K10">+^</a> <font color="Maroon">C</font> &amp; <font color="Maroon">C</font> <a href="hidden.html#R2">in</a> <font color="Maroon">m</font> )
 <b>by </b><i><a class="ref" href="ordinal3.html#D7">ORDINAL3:def 7</a></i>;<br/>
<a NAME="E4:21"/>
<font color="Maroon">n</font> <a href="ordinal3.html#K7">mod^</a> <font color="Maroon">m</font> <a href="hidden.html#R1">=</a> <font color="Maroon">n</font> <a href="ordinal3.html#K5">-^</a> <span class="p1">(<span class="default"><span class="p2">(<span class="default"><font color="Maroon">n</font> <a href="ordinal3.html#K6">div^</a> <font color="Maroon">m</font></span>)</span> <a href="arytm_3.html#K3" target="_self">*^</a> <font color="Maroon">m</font></span>)</span>
 
<b>by </b><i><a class="ref" href="ordinal3.html#D8">ORDINAL3:def 8</a></i>;<br/>
<b>hence </b><a NAME="E5:21"/>
<font color="Maroon">n</font> <a href="ordinal3.html#K7">mod^</a> <font color="Maroon">m</font> <a href="hidden.html#R2">in</a> <font color="Maroon">m</font>
 <b>by </b><i><a class="txt" href="arytm_3.html#E3:21"><i><font color="Green">E13</font></i></a>, <a class="ref" href="ordinal3.html#T65">ORDINAL3:65</a></i>;<br/>


</div>
