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<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="catalg_1.html#NM1">Signature</a>;<br/>

<b>thus </b><a NAME="E1:51"/>
<font color="Maroon">c<sub>1</sub></font> is    <a href="instalg1.html#M1">Subsignature</a> of <font color="Maroon">c<sub>1</sub></font>
 <b>by </b><i><a class="ref" href="instalg1.html#T16">INSTALG1:16</a></i>; <i><font color="Red">:: according to </font></i><a class="ref" href="algspec1.html#D5" target="_self">ALGSPEC1:def 5</a><br/>


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