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<a NAME="E1:147_2_1"/><i><font color="Green">E49</font></i>: 
( 1 <a href="xxreal_0.html#R1">&lt;=</a> 2 &amp; 2 <a href="xxreal_0.html#R1">&lt;=</a> 1 <a href="nat_1.html#K1">+</a> 1 &amp;  <a href="comput_1.html#K3" target="_self">arity</a> <font color="Maroon">f</font> <a href="hidden.html#R1">=</a> 1 &amp;  <a href="comput_1.html#K3" target="_self">arity</a> <font color="Maroon">g</font> <a href="hidden.html#R1">=</a> 1 <a href="nat_1.html#K1">+</a> 2 &amp; <font color="Maroon">f</font> <a href="hidden.html#R2">in</a>  <a href="comput_1.html#K11" target="_self">PrimRec</a>  &amp; <font color="Maroon">g</font> <a href="hidden.html#R2">in</a>  <a href="comput_1.html#K11" target="_self">PrimRec</a>  )
 
<b>by </b><i><a class="ref" href="comput_1.html#T17" target="_self">Th17</a>, <a class="ref" href="comput_1.html#T19" target="_self">Th19</a>, </i>;<br/>
<b>hence </b><a NAME="E2:147_2_1"/>
 <a href="comput_1.html#K10" target="_self">primrec</a> <font color="Maroon">f</font>,<font color="Maroon">g</font>,2 <a href="hidden.html#R2">in</a>  <a href="comput_1.html#K11" target="_self">PrimRec</a> 
 <b>by </b><i/>; <i><font color="Red">:: according to </font></i><a class="ref" href="comput_1.html#D19" target="_self">COMPUT_1:def 19</a><br/>

<b>thus </b><a NAME="E3:147_2_1"/>
 <a href="comput_1.html#K3" target="_self">arity</a> <span class="p1">(<span class="default"><a href="comput_1.html#K10" target="_self">primrec</a> <font color="Maroon">f</font>,<font color="Maroon">g</font>,2</span>)</span> <a href="hidden.html#R1">=</a> 2
 <b>by </b><i><a class="ref" href="comput_1.html#T20" target="_self">Th20</a>, </i>; <i><font color="Red">:: according to </font></i><a class="ref" href="comput_1.html#D26" target="_self">COMPUT_1:def 26</a><br/>


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