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<b>let </b><font color="Maroon">Y</font> be    <a href="pre_topc.html#L1">TopStruct</a> ;<br/>

<b>assume </b><a NAME="E1:11"/>
( <font color="Maroon">Y</font> is <a href="tdlat_3.html#V1" target="_self">discrete</a> &amp; <font color="Maroon">Y</font> is <a href="tdlat_3.html#V2" target="_self">anti-discrete</a> )
 ;<br/>

<a NAME="E2:11"/><b>then </b>
( the <a href="pre_topc.html#U1">topology</a> of <font color="Maroon">Y</font> <a href="hidden.html#R1">=</a>  <a href="pcomps_1.html#K1">bool</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">Y</font> &amp; the <a href="pre_topc.html#U1">topology</a> of <font color="Maroon">Y</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> ,the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">Y</font></span><a href="tarski.html#K2">}</a></span> )
 
<b>by </b><i>, </i>;<br/>
<b>hence </b><a NAME="E3:11"/>
 <a href="pcomps_1.html#K1">bool</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">Y</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> ,the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">Y</font></span><a href="tarski.html#K2">}</a></span>
 ;<br/>


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