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<b>let </b><font color="Maroon" title="c1">X</font> be  non <a href="struct_0.html#V2" title="STRUCT_0:attr.2">empty</a> <a href="pre_topc.html#NM1" title="PRE_TOPC:NM.1">TopSpace</a>;<br/>

<b>assume </b><a NAME="E1:57_1_1"/><i><font color="Green" title="E30">A1</font></i>: 
<font color="Maroon" title="c1">X</font> is <a href="tdlat_3.html#V5" title="TDLAT_3:attr.5">hereditarily_extremally_disconnected</a>
 ;<br/>

<a NAME="E2:57_1_1"/>
<font color="Maroon" title="c1">X</font> is    <a href="pre_topc.html#M1" title="PRE_TOPC:mode.1">SubSpace</a> of <font color="Maroon" title="c1">X</font>
 
<b>by </b><i><a class="ref" href="tsep_1.html#T2" title="TSEP_1:th.2">TSEP_1:2</a></i>;<br/>
<b>hence </b><a NAME="E3:57_1_1"/>
<font color="Maroon" title="c1">X</font> is <a href="tdlat_3.html#V4" title="TDLAT_3:attr.4">extremally_disconnected</a>
 <b>by </b><i><a class="txt" href="tdlat_3.html#E1:57_1_1"><i><font color="Green" title="E30">A1</font></i></a>, <a class="ref" href="tdlat_3.html#D5" target="_self" title="TDLAT_3:def.5">Def5</a></i>;<br/>


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