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<b>consider </b><font color="Maroon">c<sub>2</sub></font>, <font color="Maroon">c<sub>3</sub></font> being   <a href="glib_000.html#NM10">Vertex</a> of <font color="Maroon">c<sub>1</sub></font><b> such that </b><br/><a NAME="E2:54_1_1"/><i><font color="Green">E37</font></i>: 
( <font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> <font color="Maroon">c<sub>3</sub></font> &amp; <font color="Maroon">c<sub>2</sub></font> is <a href="glib_000.html#V11">endvertex</a> &amp; <font color="Maroon">c<sub>3</sub></font> is <a href="glib_000.html#V11">endvertex</a> )
 <b>by </b><i><a class="txt" href="glib_002.html#E37"><i><font color="Green">Lemma36</font></i></a></i>;<br/>
<b>take </b>
<font color="Maroon">c<sub>2</sub></font>
;<br/>

<b>thus </b><a NAME="E3:54_1_1"/>
<font color="Maroon">c<sub>2</sub></font> is <a href="glib_000.html#V11">endvertex</a>
 <b>by </b><i><a class="txt" href="glib_002.html#E2:54_1_1"><i><font color="Green">E37</font></i></a></i>;<br/>


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