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<a NAME="E1:72_1_1"/>
 <a href="jordan6.html#K9" target="_self">Lower_Arc</a> <font color="Maroon">S</font> <a href="topreal1.html#R1">is_an_arc_of</a>  <a href="pscomp_1.html#K31">E-max</a> <font color="Maroon">S</font>, <a href="pscomp_1.html#K27">W-min</a> <font color="Maroon">S</font>
 
<b>by </b><i><a class="ref" href="jordan6.html#T4" target="_self">Th4</a></i>;<br/>
<b>hence </b><a NAME="E2:72_1_1"/>
( not  <a href="jordan6.html#K9" target="_self">Lower_Arc</a> <font color="Maroon">S</font> is <a href="xboole_0.html#V1">empty</a> &amp;  <a href="jordan6.html#K9" target="_self">Lower_Arc</a> <font color="Maroon">S</font> is <a href="compts_1.html#V6">compact</a> )
 <b>by </b><i><a class="ref" href="jordan5a.html#T1">JORDAN5A:1</a></i>;<br/>


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