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<b>let </b><font color="Maroon">R</font> be   <a href="alg_1.html#NM1">Relation</a> of <font color="Maroon">L</font>;<br/>

<b>assume </b><a NAME="E1:15_1_1"/>
( <font color="Maroon">R</font> is <a href="waybel35.html#V1" target="_self">extra-order</a> &amp; <font color="Maroon">R</font> is <a href="waybel_4.html#V3">auxiliary(iii)</a> )
 ;<br/>

<b>hence </b><a NAME="E2:15_1_1"/>
( <font color="Maroon">R</font> is <a href="waybel_4.html#V1">auxiliary(i)</a> &amp; <font color="Maroon">R</font> is <a href="waybel_4.html#V2">auxiliary(ii)</a> &amp; <font color="Maroon">R</font> is <a href="waybel_4.html#V3">auxiliary(iii)</a> &amp; <font color="Maroon">R</font> is <a href="waybel_4.html#V4">auxiliary(iv)</a> )
 <b>by </b><i/>; <i><font color="Red">:: according to </font></i><a class="ref" href="waybel_4.html#D8">WAYBEL_4:def 8</a><br/>


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