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<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="glib_000.html#NM2">_Graph</a>;<br/><b>let </b><font color="Maroon">c<sub>2</sub></font> be  <a href="glib_000.html#V9" target="_self">spanning</a>  <a href="glib_000.html#M2" target="_self">Subgraph</a> of <font color="Maroon">c<sub>1</sub></font>;<br/><b>let </b><font color="Maroon">c<sub>3</sub></font> be  <a href="glib_000.html#V9" target="_self">spanning</a>  <a href="glib_000.html#M2" target="_self">Subgraph</a> of <font color="Maroon">c<sub>2</sub></font>;<br/>





 <a href="glib_000.html#K25" target="_self">the_Vertices_of</a> <font color="Maroon">c<sub>3</sub></font> = 
 <a href="glib_000.html#K25" target="_self">the_Vertices_of</a> <font color="Maroon">c<sub>2</sub></font>
<b>by </b><i><a class="ref" href="glib_000.html#D35" target="_self">Def35</a></i>
<br/>.= 
 <a href="glib_000.html#K6" target="_self">the_Vertices_of</a> <font color="Maroon">c<sub>1</sub></font>
<b>by </b><i><a class="ref" href="glib_000.html#D35" target="_self">Def35</a></i>
;<br/>
<b>hence </b><a NAME="E2:167"/>
<font color="Maroon">c<sub>3</sub></font> is  <a href="glib_000.html#V9" target="_self">spanning</a>  <a href="glib_000.html#M2" target="_self">Subgraph</a> of <font color="Maroon">c<sub>1</sub></font>
 <b>by </b><i><a class="ref" href="glib_000.html#D35" target="_self">Def35</a>, <a class="ref" href="glib_000.html#T46" target="_self">Th46</a></i>;<br/>


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