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<b>let </b><font color="Maroon" title="c1">a</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="E1:43"/><i><font color="Green" title="E36">A1</font></i>: 
<font color="Maroon" title="c1">a</font> <a href="hidden.html#NR2" title="HIDDEN:NR.2">&lt;&gt;</a>  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a> 
 ;<br/>

<b>thus </b> <a href="arytm_3.html#K6" title="ARYTM_3:func.6">RED</a> <font color="Maroon" title="c1">a</font>,<font color="Maroon" title="c1">a</font> = 
<font color="Maroon" title="c1">a</font> <a href="ordinal3.html#K6" title="ORDINAL3:func.6">div^</a> <font color="Maroon" title="c1">a</font>
<b>by </b><i><a class="ref" href="arytm_3.html#T21" target="_self" title="ARYTM_3:th.21">Th21</a></i>
<br/>.= 
<span class="p1">(<span class="default"><font color="Maroon" title="c1">a</font> <a href="arytm_3.html#K3" title="ARYTM_3:func.3">*^</a> 1</span>)</span> <a href="ordinal3.html#K6" title="ORDINAL3:func.6">div^</a> <font color="Maroon" title="c1">a</font>
<b>by </b><i><a class="ref" href="ordinal2.html#T56" title="ORDINAL2:th.56">ORDINAL2:56</a></i>
<br/>.= 
1
<b>by </b><i><a class="txt" href="arytm_3.html#E1:43"><i><font color="Green" title="E36">A1</font></i></a>, <a class="ref" href="ordinal3.html#T81" title="ORDINAL3:th.81">ORDINAL3:81</a></i>
;<br/>


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