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<b>let </b><font color="Maroon">T</font> be  non <a href="struct_0.html#V3">empty</a> <a href="pre_topc.html#NM1">TopSpace</a>;<br/>

<b>assume </b><a NAME="E1:13_1_1"/><i><font color="Green">E28</font></i>: 
( <font color="Maroon">T</font> is <a href="group_1.html#V6">finite</a> &amp; <font color="Maroon">T</font> is <a href="urysohn1.html#V1">being_T1</a> )
 ;<br/>

<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="13_1_1_1"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">A</font> be   <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">T</font>;<br/><b>reconsider </b><font color="Maroon">W</font> = <font color="Maroon">T</font> as  non <a href="struct_0.html#V3">empty</a> <a href="group_1.html#V6">finite</a> <a href="pre_topc.html#NM1">TopSpace</a> <b>by </b><i/>;<br/><b>reconsider </b><font color="Maroon">K</font> = <font color="Maroon">A</font> as   <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">W</font> ;<br/><a NAME="E3:13_1_1_1"/>
<font color="Maroon">K</font> is <a href="pre_topc.html#V4">closed</a>
 <b>by </b><i>, </i>;<br/><b>hence </b><a NAME="E4:13_1_1_1"/>
<font color="Maroon">A</font> is <a href="pre_topc.html#V4">closed</a>
 ;<br/></div><b>end;</b></div>
<b>hence </b><a NAME="E3:13_1_1"/>
<font color="Maroon">T</font> is <a href="tdlat_3.html#V1">discrete</a>
 <b>by </b><i><a class="ref" href="tdlat_3.html#T18">TDLAT_3:18</a></i>;<br/>


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