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<b>set </b><font color="Maroon">c<sub>1</sub></font> = <span class="p1"><a href="tarski.html#K1">{</a><span class="default"><a href="xboole_0.html#K1">{}</a> </span><a href="tarski.html#K1">}</a></span>;<br/>
<b>reconsider </b><font color="Maroon">c<sub>2</sub></font> =  <a href="pcomps_1.html#K1">bool</a> <span class="p1"><a href="tarski.html#K1">{</a><span class="default"><a href="xboole_0.html#K1">{}</a> </span><a href="tarski.html#K1">}</a></span> as   <a href="setfam_1.html#NM1">Subset-Family</a> of <span class="p1"><a href="tarski.html#K1">{</a><span class="default"><a href="xboole_0.html#K1">{}</a> </span><a href="tarski.html#K1">}</a></span> ;<br/>
<b>take </b><font color="Maroon">c<sub>3</sub></font> =  <a href="pre_topc.html#G1">TopStruct</a>(# <span class="p1"><a href="tarski.html#K1">{</a><span class="default"><a href="xboole_0.html#K1">{}</a> </span><a href="tarski.html#K1">}</a></span>,<font color="Maroon">c<sub>2</sub></font> #);<br/>

<b>thus </b><a NAME="E2:13_1_1"/>
<font color="Maroon">c<sub>3</sub></font> is <a href="tdlat_3.html#V1" target="_self">discrete</a>
 <b>by </b><i><a class="ref" href="tdlat_3.html#D1" target="_self">Def1</a></i>;<br/>

<a NAME="E3:13_1_1"/>
<font color="Maroon">c<sub>2</sub></font> <a href="hidden.html#R1">=</a> <span class="p1"><a href="tarski.html#K2">{</a><span class="default"><a href="xboole_0.html#K1">{}</a> ,<span class="p2"><a href="tarski.html#K1">{</a><span class="default"><a href="xboole_0.html#K1">{}</a> </span><a href="tarski.html#K1">}</a></span></span><a href="tarski.html#K2">}</a></span>
 
<b>by </b><i><a class="ref" href="zfmisc_1.html#T30">ZFMISC_1:30</a></i>;<br/>
<b>hence </b><a NAME="E4:13_1_1"/>
<font color="Maroon">c<sub>3</sub></font> is <a href="tdlat_3.html#V2" target="_self">anti-discrete</a>
 <b>by </b><i><a class="ref" href="tdlat_3.html#D2" target="_self">Def2</a></i>;<br/>

<b>thus </b><a NAME="E5:13_1_1"/>
( <font color="Maroon">c<sub>3</sub></font> is <a href="pre_topc.html#V1">strict</a> &amp; not <font color="Maroon">c<sub>3</sub></font> is <a href="struct_0.html#V3">empty</a> )
 ;<br/>


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