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<b>let </b><font color="Maroon" title="c3">x</font> be    <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of  <a href="arytm_3.html#K7" title="ARYTM_3:func.7">RAT+</a> ;<br/>

<b>set </b><font color="Maroon" title="c4">y</font> =  <a href="arytm_3.html#K14" title="ARYTM_3:func.14">one</a> ;<br/>
<a NAME="E1:79"/>
( <span class="p1">(<span class="default"><a href="arytm_3.html#K8" title="ARYTM_3:func.8">numerator</a> <font color="Maroon" title="c3">x</font></span>)</span> <a href="arytm_3.html#K3" title="ARYTM_3:func.3">*^</a> 1 <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="arytm_3.html#K8" title="ARYTM_3:func.8">numerator</a> <font color="Maroon" title="c3">x</font> &amp; <span class="p1">(<span class="default"><a href="arytm_3.html#K9" title="ARYTM_3:func.9">denominator</a> <font color="Maroon" title="c3">x</font></span>)</span> <a href="arytm_3.html#K3" title="ARYTM_3:func.3">*^</a> 1 <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="arytm_3.html#K9" title="ARYTM_3:func.9">denominator</a> <font color="Maroon" title="c3">x</font> &amp;  <a href="arytm_3.html#K8" title="ARYTM_3:func.8">numerator</a> <a href="arytm_3.html#K14" title="ARYTM_3:func.14">one</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> 1 &amp;  <a href="arytm_3.html#K9" title="ARYTM_3:func.9">denominator</a> <a href="arytm_3.html#K14" title="ARYTM_3:func.14">one</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> 1 )
 
<b>by </b><i><a class="ref" href="arytm_3.html#D8" target="_self" title="ARYTM_3:def.8">Def8</a>, <a class="ref" href="arytm_3.html#D9" target="_self" title="ARYTM_3:def.9">Def9</a>, <a class="ref" href="ordinal2.html#T56" title="ORDINAL2:th.56">ORDINAL2:56</a></i>;<br/>
<b>hence </b><a NAME="E2:79"/>
<font color="Maroon" title="c3">x</font> <a href="arytm_3.html#K12" title="ARYTM_3:func.12">*'</a> <a href="arytm_3.html#K14" title="ARYTM_3:func.14">one</a>  <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c3">x</font>
 <b>by </b><i><a class="ref" href="arytm_3.html#T45" target="_self" title="ARYTM_3:th.45">Th45</a></i>;<br/>


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