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<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="diraf.html#NM2">AffinPlane</a>;<br/>

<b>assume </b><a NAME="E1:42"/>
<font color="Maroon">c<sub>1</sub></font> <a href="aff_2.html#NR7" target="_self">satisfies_TDES</a> 
 ;<br/>

<a NAME="E2:42"/><b>then </b>
<font color="Maroon">c<sub>1</sub></font> <a href="aff_2.html#NR8" target="_self">satisfies_TDES_1</a> 
 
<b>by </b><i><a class="ref" href="aff_2.html#T17" target="_self">Th17</a></i>;<br/>
<a NAME="E3:42"/><b>then </b>
<font color="Maroon">c<sub>1</sub></font> <a href="aff_2.html#NR12" target="_self">satisfies_des_1</a> 
 
<b>by </b><i><a class="ref" href="aff_2.html#T27" target="_self">Th27</a></i>;<br/>
<b>hence </b><a NAME="E4:42"/>
<font color="Maroon">c<sub>1</sub></font> <a href="aff_2.html#NR11" target="_self">satisfies_des</a> 
 <b>by </b><i><a class="ref" href="aff_2.html#T21" target="_self">Th21</a></i>;<br/>


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