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<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="seq_1.html#NM1">Real_Sequence</a>;<br/>

<a NAME="E1:15"/>
 <a href="partfun3.html#K6">-</a> <span class="p1">(<span class="default"><a href="partfun3.html#K6">-</a> <font color="Maroon">c<sub>1</sub></font></span>)</span> <a href="funct_2.html#R2">=</a> <font color="Maroon">c<sub>1</sub></font>
 
<b>by </b><i><a class="ref" href="seq_1.html#T36">SEQ_1:36</a></i>;<br/>
<b>hence </b><a NAME="E2:15"/>
( <font color="Maroon">c<sub>1</sub></font> is <a href="seq_2.html#V2">bounded_below</a> iff  <a href="partfun3.html#K6">-</a> <font color="Maroon">c<sub>1</sub></font> is <a href="seq_2.html#V1">bounded_above</a> )
 <b>by </b><i><a class="ref" href="rinfsup1.html#T11" target="_self">Th11</a></i>;<br/>


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