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<b>let </b><font color="Maroon">c<sub>1</sub></font> be  <a href="xreal_0.html#V1">real</a>  <a href="ordinal1.html#NM1" target="_self">number</a> ;<br/>

<i><font color="Green">E8</font></i>: <span class="p1">(<span class="default"><a href="limfunc1.html#K4">right_open_halfline</a> <font color="Maroon">c<sub>1</sub></font></span>)</span> <a href="subset_1.html#K3">`</a>  = 
<a href="numbers.html#K1">REAL</a>  <a href="subset_1.html#K6">\</a> <span class="p1">(<span class="default"><a href="limfunc1.html#K4">right_open_halfline</a> <font color="Maroon">c<sub>1</sub></font></span>)</span>

<br/>.= 
 <a href="limfunc1.html#K2">left_closed_halfline</a> <font color="Maroon">c<sub>1</sub></font>
<b>by </b><i><a class="ref" href="limfunc1.html#T24">LIMFUNC1:24</a></i>
;<br/>
<a NAME="E2:8"/>
 <a href="limfunc1.html#K2">left_closed_halfline</a> <font color="Maroon">c<sub>1</sub></font> is <a href="rcomp_1.html#V2">closed</a>
 
<b>by </b><i><a class="ref" href="fcont_3.html#T6" target="_self">Th6</a></i>;<br/>
<b>hence </b><a NAME="E3:8"/>
 <a href="limfunc1.html#K4">right_open_halfline</a> <font color="Maroon">c<sub>1</sub></font> is <a href="rcomp_1.html#V3">open</a>
 <b>by </b><i><a class="txt" href="fcont_3.html#E1:8"><i><font color="Green">E8</font></i></a>, <a class="ref" href="rcomp_1.html#D5">RCOMP_1:def 5</a></i>;<br/>


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