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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="E2:50_1_1"/><i><font color="Green">E34</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; not <font color="Maroon">c<sub>2</sub></font> is <a href="glib_002.html#V5" target="_self">cut-vertex</a> &amp; not <font color="Maroon">c<sub>3</sub></font> is <a href="glib_002.html#V5" target="_self">cut-vertex</a> )
 <b>by </b><i><a class="txt" href="glib_002.html#E34"><i><font color="Green">Lemma33</font></i></a></i>;<br/>
<b>thus </b><a NAME="E3:50_1_1"/>
not for <font color="Olive">b<sub>1</sub></font> being  <a href="glib_000.html#NM10">Vertex</a> of <font color="Maroon">c<sub>1</sub></font> holds <font color="Olive">b<sub>1</sub></font> is <a href="glib_002.html#V5" target="_self">cut-vertex</a>
 <b>by </b><i><a class="txt" href="glib_002.html#E2:50_1_1"><i><font color="Green">E34</font></i></a></i>;<br/>


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