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<b>let </b><font color="Maroon">G</font> be  <a href="glib_000.html#V2">finite</a> <a href="glib_000.html#NM2">_Graph</a>;<br/><b>let </b><font color="Maroon">S</font> be    <a href="chord.html#M3" target="_self">VertexScheme</a> of <font color="Maroon">G</font>;<br/>



<a NAME="E1:126"/>
(  <a href="relat_1.html#K2">rng</a> <font color="Maroon">S</font> <a href="hidden.html#R1">=</a>  <a href="glib_000.html#K6">the_Vertices_of</a> <font color="Maroon">G</font> &amp; <font color="Maroon">S</font> is <a href="funct_1.html#V2">one-to-one</a> )
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E2:126"/>
 <a href="finseq_1.html#K3">len</a> <font color="Maroon">S</font> <a href="hidden.html#R1">=</a>  <a href="card_1.html#K4">card</a> <span class="p1">(<span class="default"><a href="glib_000.html#K6">the_Vertices_of</a> <font color="Maroon">G</font></span>)</span>
 <b>by </b><i><a class="ref" href="finseq_4.html#T77">FINSEQ_4:77</a></i>;<br/>


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