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<b>consider </b><font color="Maroon" title="c1">D</font> being  non <a href="realset1.html#V1" title="REALSET1:attr.1">trivial</a>  <a href="hidden.html#M1" title="HIDDEN:mode.1">set</a> ;<br/>
<a NAME="E2:2_1_1"/>
not  <a href="tex_1.html#K2" title="TEX_1:func.2">ADTS</a> <font color="Maroon" title="c1">D</font> is <a href="realset2.html#V3" title="REALSET2:attr.3">trivial</a>
 
;<br/>
<b>hence </b><a NAME="E3:2_1_1"/>
 ex <font color="Olive">b<sub>1</sub></font> being  <a href="pre_topc.html#NM1" title="PRE_TOPC:NM.1">TopSpace</a> st <br/>( <font color="Olive">b<sub>1</sub></font> is <a href="tdlat_3.html#V2" title="TDLAT_3:attr.2">anti-discrete</a> &amp; not <font color="Olive">b<sub>1</sub></font> is <a href="realset2.html#V3" title="REALSET2:attr.3">trivial</a> &amp; not <font color="Olive">b<sub>1</sub></font> is <a href="struct_0.html#V3" title="STRUCT_0:attr.3">empty</a> &amp; <font color="Olive">b<sub>1</sub></font> is <a href="pre_topc.html#V1" title="PRE_TOPC:attr.1">strict</a> )
 ;<br/>


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