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<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="glib_003.html#NM1">WGraph</a>;<br/><b>let </b><font color="Maroon">c<sub>2</sub></font> be    <a href="glib_001.html#M3">Walk</a> of <font color="Maroon">c<sub>1</sub></font>;<br/>



<b>assume </b><a NAME="E1:160"/>
<font color="Maroon">c<sub>2</sub></font> is <a href="glib_001.html#V3">trivial</a>
 ;<br/>

<a NAME="E2:160"/><b>then </b>
<font color="Maroon">c<sub>2</sub></font> <a href="glib_001.html#K15">.length()</a>  <a href="hidden.html#R1">=</a> 0
 
<b>by </b><i><a class="ref" href="glib_001.html#D26">GLIB_001:def 26</a></i>;<br/>
<a NAME="E3:160"/><b>then </b>
 <a href="finseq_1.html#K3">len</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="glib_001.html#K12">.edgeSeq()</a> </span>)</span> <a href="hidden.html#R1">=</a> 0
 
<b>by </b><i><a class="ref" href="glib_001.html#D18">GLIB_001:def 18</a></i>;<br/>
<a NAME="E4:160"/><b>then </b>
 <a href="finseq_1.html#K3">len</a> <span class="p1">(<span class="default"><font color="Maroon">c<sub>2</sub></font> <a href="glib_003.html#K8" target="_self">.weightSeq()</a> </span>)</span> <a href="hidden.html#R1">=</a> 0
 
<b>by </b><i><a class="ref" href="glib_003.html#D18" target="_self">Def18</a></i>;<br/>
<b>hence </b><a NAME="E5:160"/>
<font color="Maroon">c<sub>2</sub></font> <a href="glib_003.html#K8" target="_self">.weightSeq()</a>  <a href="hidden.html#R1">=</a>  <a href="xboole_0.html#K1">{}</a> 
 <b>by </b><i><a class="ref" href="finseq_1.html#T25">FINSEQ_1:25</a></i>;<br/>


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