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<span class="kw">let </span><font color="Maroon" title="c2">x</font> be   <a href="int_1.html#NM1" title="INT_1:NM.1">Integer</a>; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> <font color="Maroon" title="c2">x</font> is   <a href="rat_1.html#NM1" title="RAT_1:NM.1">Rational</a></span><br/>

<a NAME="E1:15"/>
<font color="Maroon" title="c2">x</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c2">x</font> <a href="real_1.html#K6" title="REAL_1:func.6">/</a> 1
 
;<br/>
<span class="kw">hence </span><a NAME="E2:15"/>
<font color="Maroon" title="c2">x</font> is   <a href="rat_1.html#NM1" title="RAT_1:NM.1">Rational</a>
 <span class="kw">by</span> <span class="lab"><a class="ref" href="rat_1.html#T3" target="_self" title="RAT_1:th.3">Th6</a></span>; <a class="txt" onclick="hs(this)" href="javascript:()"><span class="comment"><font color="firebrick">::  thesis: </font></span></a><span class="hide"> verum</span><br/>


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