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<b>take </b><font color="Maroon">c<sub>8</sub></font> = 1;<br/>

<b>thus </b><a NAME="E1:21_1_1"/>
0 <a href="xxreal_0.html#NR3" target="_self">&lt;</a> <font color="Maroon">c<sub>8</sub></font>
 <b>by </b><i><a class="txt" href="xreal_0.html#E7"><i><font color="Green">Lemma7</font></i></a>, <a class="txt" href="xreal_0.html#E14"><i><font color="Green">Lemma11</font></i></a></i>; <i><font color="Red">:: according to </font></i><a class="ref" href="xxreal_0.html#D6">XXREAL_0:def 6</a><br/>


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