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<b>consider </b><font color="Maroon">x</font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font>;<br/>
<b>take </b>
 <a href="waybel_0.html#K5">downarrow</a> <font color="Maroon">x</font>
;<br/>

<b>thus </b><a NAME="E2:9_1_1"/>
 <a href="waybel_0.html#K5">downarrow</a> <font color="Maroon">x</font> is <a href="waybel_0.html#V14">principal</a>
 <b>by </b><i><a class="ref" href="waybel_0.html#T48">WAYBEL_0:48</a></i>;<br/>


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