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<b>consider </b><font color="Maroon">A</font> being  non <a href="xboole_0.html#V1">empty</a> <a href="tex_2.html#V1">proper</a> <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">T</font>;<br/>
<b>consider </b><font color="Maroon">x</font> being   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">T</font>;<br/>
<b>reconsider </b><font color="Maroon">A</font> = <span class="p1"><a href="domain_1.html#K6">{</a><span class="default"><font color="Maroon">x</font></span><a href="domain_1.html#K6">}</a></span> as   <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">T</font> ;<br/>
<a NAME="E4:76_1_1"/>
 <a href="pre_topc.html#K4">Cl</a> <font color="Maroon">A</font> <a href="hidden.html#R1">=</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">T</font>
 
<b>by </b><i><a class="ref" href="tex_1.html#T11">TEX_1:11</a></i>;<br/>
<b>hence </b><a NAME="E5:76_1_1"/>
 ex <font color="Olive">b<sub>1</sub></font> being  <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">T</font> st <font color="Olive">b<sub>1</sub></font> is <a href="isomichi.html#V4" target="_self">2nd_class</a>
 ;<br/>


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