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<b>let </b><font color="Maroon" title="c1">o</font>, <font color="Maroon" title="c2">m</font> be    <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ;<br/>



<a NAME="E1:76"/>
 <a href="cat_1.html#K8" title="CAT_1:func.8">1Cat</a> <font color="Maroon" title="c1">o</font>,<font color="Maroon" title="c2">m</font> is <a href="nattra_1.html#V2" title="NATTRA_1:attr.2">discrete</a>
 
<b>by </b><i><a class="ref" href="nattra_1.html#T46" target="_self" title="NATTRA_1:th.46">Th46</a></i>;<br/>
<b>hence </b><a NAME="E2:76"/>
 <a href="nattra_1.html#K13" title="NATTRA_1:func.13">IdCat</a> <span class="p1">(<span class="default"><a href="cat_1.html#K8" title="CAT_1:func.8">1Cat</a> <font color="Maroon" title="c1">o</font>,<font color="Maroon" title="c2">m</font></span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="cat_1.html#K8" title="CAT_1:func.8">1Cat</a> <font color="Maroon" title="c1">o</font>,<font color="Maroon" title="c2">m</font>
 <b>by </b><i><a class="ref" href="nattra_1.html#T52" target="_self" title="NATTRA_1:th.52">Th52</a></i>;<br/>


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