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<b>let </b><font color="Maroon">c<sub>1</sub></font>, <font color="Maroon">c<sub>2</sub></font> be   <a href="struct_0.html#NM1">Element</a> of <a href="algstr_1.html#K2" target="_self">L_Trivial</a> ;<br/>

<b>take </b><font color="Maroon">c<sub>3</sub></font> =  <a href="rlvect_1.html#K1">0.</a> <a href="algstr_1.html#K2" target="_self">L_Trivial</a> ;<br/>

<b>thus </b><a NAME="E1:8"/>
<font color="Maroon">c<sub>1</sub></font> <a href="rlvect_1.html#K2">+</a> <font color="Maroon">c<sub>3</sub></font> <a href="hidden.html#R1">=</a> <font color="Maroon">c<sub>2</sub></font>
 <b>by </b><i><a class="ref" href="algstr_1.html#T5" target="_self">Th5</a></i>;<br/>


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