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<b>let </b><font color="Maroon">c<sub>3</sub></font> be    <a href="subset_1.html#M1">Element</a> of  <a href="arytm_3.html#K7" target="_self">RAT+</a> ;<br/>

<b>take </b>
<font color="Maroon">c<sub>3</sub></font>
; <i><font color="Red">:: according to </font></i><a class="ref" href="arytm_3.html#D13" target="_self">ARYTM_3:def 13</a><br/>

<b>thus </b><a NAME="E1:92"/>
<font color="Maroon">c<sub>3</sub></font> <a href="hidden.html#R1">=</a> <a href="arytm_3.html#K13" target="_self">{}</a>  <a href="arytm_3.html#K11" target="_self">+</a> <font color="Maroon">c<sub>3</sub></font>
 <b>by </b><i><a class="ref" href="arytm_3.html#T56" target="_self">Th56</a></i>;<br/>


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