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<b>let </b><font color="Maroon">C</font> be   <a href="topreal2.html#NM1">Simple_closed_curve</a>;<br/>

<a NAME="E1:23"/>
<span class="p1">(<span class="default"><a href="jordan6.html#K10">Lower_Middle_Point</a> <font color="Maroon">C</font></span>)</span> <a href="euclid.html#K22">`2</a>  <a href="hidden.html#NR2" target="_self">&lt;&gt;</a> <span class="p1">(<span class="default"><a href="jordan6.html#K11">Upper_Middle_Point</a> <font color="Maroon">C</font></span>)</span> <a href="euclid.html#K22">`2</a> 
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E2:23"/>
 <a href="jordan6.html#K10">Lower_Middle_Point</a> <font color="Maroon">C</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a>  <a href="jordan6.html#K11">Upper_Middle_Point</a> <font color="Maroon">C</font>
 ;<br/>


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