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<b>let </b><font color="Maroon">Y</font> be  non <a href="struct_0.html#V3">empty</a> <a href="tdlat_3.html#V4" target="_self">extremally_disconnected</a> <a href="pre_topc.html#NM1">TopSpace</a>;<br/>

<a NAME="E1:66"/>
(  <a href="tdlat_1.html#K1">Domains_of</a> <font color="Maroon">Y</font> <a href="hidden.html#R1">=</a>  <a href="tdlat_1.html#K5">Closed_Domains_of</a> <font color="Maroon">Y</font> &amp;  <a href="tdlat_1.html#NK3" target="_self">D-Union</a> <font color="Maroon">Y</font> <a href="hidden.html#R1">=</a>  <a href="tdlat_1.html#NK9" target="_self">CLD-Union</a> <font color="Maroon">Y</font> &amp;  <a href="tdlat_1.html#NK5" target="_self">D-Meet</a> <font color="Maroon">Y</font> <a href="hidden.html#R1">=</a>  <a href="tdlat_1.html#NK11" target="_self">CLD-Meet</a> <font color="Maroon">Y</font> )
 
<b>by </b><i>, </i>;<br/>
<b>hence </b> <a href="tdlat_1.html#K4">Domains_Lattice</a> <font color="Maroon">Y</font> = 
 <a href="lattices.html#G3">LattStr</a>(# <span class="p1">(<span class="default"><a href="tdlat_1.html#K5">Closed_Domains_of</a> <font color="Maroon">Y</font></span>)</span>,<span class="p1">(<span class="default"><a href="tdlat_1.html#NK9" target="_self">CLD-Union</a> <font color="Maroon">Y</font></span>)</span>,<span class="p1">(<span class="default"><a href="tdlat_1.html#NK11" target="_self">CLD-Meet</a> <font color="Maroon">Y</font></span>)</span> #)
<b>by </b><i><a class="ref" href="tdlat_1.html#D4">TDLAT_1:def 4</a></i>
<br/>.= 
 <a href="tdlat_1.html#K8">Closed_Domains_Lattice</a> <font color="Maroon">Y</font>
<b>by </b><i><a class="ref" href="tdlat_1.html#D8">TDLAT_1:def 8</a></i>
;<br/><br/>


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