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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">X0</font> be  non <a href="struct_0.html#V3">empty</a> <a href="tsp_2.html#NM1">maximal_Kolmogorov_subspace</a> of <font color="Maroon">X</font>;<br/><b>let </b><font color="Maroon">a</font> be   <a href="pre_topc.html#NM2">Point</a> of <font color="Maroon">X</font>;<br/><b>let </b><font color="Maroon">b</font> be   <a href="pre_topc.html#NM2">Point</a> of <font color="Maroon">X0</font>;<br/>







<b>assume </b><a NAME="E1:42"/><i><font color="Green">E17</font></i>: 
<font color="Maroon">a</font> <a href="hidden.html#R1">=</a> <font color="Maroon">b</font>
 ;<br/>

<a NAME="E2:42"/>
 <a href="tsp_2.html#K1" target="_self">Stone-retraction</a> <font color="Maroon">X</font>,<font color="Maroon">X0</font> <a href="borsuk_1.html#NR1" target="_self">is_a_retraction</a> 
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E3:42"/>
<span class="p1">(<span class="default"><a href="tsp_2.html#K1" target="_self">Stone-retraction</a> <font color="Maroon">X</font>,<font color="Maroon">X0</font></span>)</span> <a href="relset_1.html#K11">"</a> <span class="p1"><a href="domain_1.html#K6">{</a><span class="default"><font color="Maroon">b</font></span><a href="domain_1.html#K6">}</a></span> <a href="hidden.html#R1">=</a>  <a href="tex_4.html#K4">MaxADSet</a> <font color="Maroon">a</font>
 <b>by </b><i>, </i>;<br/>


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