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<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="graph_1.html#NM1">Graph</a>;<br/>

<b>assume </b><a NAME="E1:35_1_1"/><i><font color="Green">E20</font></i>: 
not <font color="Maroon">c<sub>1</sub></font> is <a href="msscyc_1.html#V4" target="_self">well-founded</a>
 ;<br/>

<b>assume </b><a NAME="E2:35_1_1"/>
<font color="Maroon">c<sub>1</sub></font> is <a href="msscyc_1.html#V2" target="_self">empty</a>
 ;<br/>

<b>then reconsider </b><font color="Maroon">c<sub>2</sub></font> = <font color="Maroon">c<sub>1</sub></font> as  <a href="msscyc_1.html#V2" target="_self">empty</a> <a href="graph_1.html#NM1">Graph</a> ;<br/>
<a NAME="E4:35_1_1"/>
<font color="Maroon">c<sub>2</sub></font> is <a href="msscyc_1.html#V4" target="_self">well-founded</a>
 
;<br/>
<b>hence </b><a NAME="E5:35_1_1"/>
contradiction
 <b>by </b><i><a class="txt" href="msscyc_1.html#E1:35_1_1"><i><font color="Green">E20</font></i></a></i>;<br/>


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