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<b>let </b><font color="Maroon">X</font> be  non <a href="struct_0.html#V3">empty</a> <a href="pre_topc.html#NM1">TopSpace</a>;<br/><b>let </b><font color="Maroon">D</font> be  non <a href="xboole_0.html#V1">empty</a>  <a href="eqrel_1.html#M1">a_partition</a> of the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">X</font>;<br/><b>let </b><font color="Maroon">W</font> be   <a href="pre_topc.html#NM2">Point</a> of <span class="p1">(<span class="default"><a href="borsuk_1.html#K14" target="_self">space</a> <font color="Maroon">D</font></span>)</span>;<br/>





<b>reconsider </b><font color="Maroon">p</font> = <font color="Maroon">W</font> as    <a href="subset_1.html#M2">Element</a> of <font color="Maroon">D</font> <b>by </b><i/>;<br/>
<b>consider </b><font color="Maroon">W'</font> being   <a href="pre_topc.html#NM2">Point</a> of <font color="Maroon">X</font><b> such that </b><br/><a NAME="E3:79"/><i><font color="Green">E24</font></i>: 
<span class="p1">(<span class="default"><a href="borsuk_1.html#K2" target="_self">proj</a> <font color="Maroon">D</font></span>)</span> <a href="funct_2.html#K3">.</a> <font color="Maroon">W'</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font>
 <b>by </b><i/>;<br/>
<b>take </b>
<font color="Maroon">W'</font>
;<br/>

<b>thus </b><a NAME="E4:79"/>
<span class="p1">(<span class="default"><a href="borsuk_1.html#K15" target="_self">Proj</a> <font color="Maroon">D</font></span>)</span> <a href="funct_2.html#K3">.</a> <font color="Maroon">W'</font> <a href="hidden.html#R1">=</a> <font color="Maroon">W</font>
 <b>by </b><i/>;<br/>


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