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<b>let </b><font color="Maroon">a</font> be  <a href="xxreal_0.html#V1" target="_self">ext-real</a>  <a href="ordinal1.html#NM1" target="_self">number</a> ;<br/>

<a NAME="E1:18"/><i><font color="Green">E19</font></i>: 
 <a href="xxreal_0.html#K1" target="_self">+infty</a>  <a href="xxreal_0.html#NR2" target="_self">&gt;=</a> <font color="Maroon">a</font>
 
<b>by </b><i/>;<br/>
<b>assume </b><a NAME="E2:18"/>
<font color="Maroon">a</font> <a href="hidden.html#R2">in</a>  <a href="numbers.html#K1">REAL</a> 
 ;<br/>

<a NAME="E3:18"/><b>then </b>
<font color="Maroon">a</font> <a href="hidden.html#NR2" target="_self">&lt;&gt;</a>  <a href="xxreal_0.html#K1" target="_self">+infty</a> 
 
;<br/>
<b>hence </b><a NAME="E4:18"/>
 <a href="xxreal_0.html#K1" target="_self">+infty</a>  <a href="xxreal_0.html#NR4" target="_self">&gt;</a> <font color="Maroon">a</font>
 <b>by </b><i>, </i>;<br/>


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