<?xml version="1.0"?>
<div class="add">

<b>let </b><font color="Maroon">G</font> be   <a href="glib_000.html#NM2">_Graph</a>;<br/><b>let </b><font color="Maroon">W1</font> be    <a href="glib_001.html#M3" target="_self">Walk</a> of <font color="Maroon">G</font>;<br/><b>let </b><font color="Maroon">W2</font> be    <a href="glib_001.html#M3" target="_self">Walk</a> of <font color="Maroon">G</font>;<br/>





<b>assume </b><a NAME="E1:233"/>
<font color="Maroon">W1</font> is    <a href="glib_001.html#M4" target="_self">Subwalk</a> of <font color="Maroon">W2</font>
 ;<br/>

<a NAME="E2:233"/><b>then </b>
<font color="Maroon">W1</font> <a href="glib_001.html#R1" target="_self">is_Walk_from</a> <font color="Maroon">W2</font> <a href="glib_001.html#K3" target="_self">.first()</a> ,<font color="Maroon">W2</font> <a href="glib_001.html#K4" target="_self">.last()</a> 
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E3:233"/>
( <font color="Maroon">W1</font> <a href="glib_001.html#K3" target="_self">.first()</a>  <a href="hidden.html#R1">=</a> <font color="Maroon">W2</font> <a href="glib_001.html#K3" target="_self">.first()</a>  &amp; <font color="Maroon">W1</font> <a href="glib_001.html#K4" target="_self">.last()</a>  <a href="hidden.html#R1">=</a> <font color="Maroon">W2</font> <a href="glib_001.html#K4" target="_self">.last()</a>  )
 <b>by </b><i/>;<br/>


</div>
