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<a NAME="E1:68"/><i><font color="Green" title="E51">A1</font></i>: 
( 0 is   <a href="pre_topc.html#NM2" title="PRE_TOPC:NM.2">Point</a> of <a href="topmetr.html#K5" title="TOPMETR:func.5">I[01]</a>  &amp; 1 is   <a href="pre_topc.html#NM2" title="PRE_TOPC:NM.2">Point</a> of <a href="topmetr.html#K5" title="TOPMETR:func.5">I[01]</a>  )
 
<b>by </b><i><a class="ref" href="borsuk_1.html#T86" title="BORSUK_1:th.86">BORSUK_1:86</a></i>;<br/>
<b>hence </b><a href="borsuk_6.html#K5" title="BORSUK_6:func.5">3RP</a>  <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> 0 = 
<span class="p1">(<span class="default">1 <a href="real_1.html#K6" title="REAL_1:func.6">/</a> 2</span>)</span> <a href="real_1.html#K4" title="REAL_1:func.4">*</a> 0
<b>by </b><i><a class="ref" href="borsuk_6.html#D9" target="_self" title="BORSUK_6:def.9">Def9</a></i>
<br/>.= 
0

;<br/><br/>

<b>thus </b><a href="borsuk_6.html#K5" title="BORSUK_6:func.5">3RP</a>  <a href="funct_1.html#K1" title="FUNCT_1:func.1">.</a> 1 = 
<span class="p1">(<span class="default">2 <a href="real_1.html#K4" title="REAL_1:func.4">*</a> 1</span>)</span> <a href="real_1.html#K5" title="REAL_1:func.5">-</a> 1
<b>by </b><i><a class="txt" href="borsuk_6.html#E1:68"><i><font color="Green" title="E51">A1</font></i></a>, <a class="ref" href="borsuk_6.html#D9" target="_self" title="BORSUK_6:def.9">Def9</a></i>
<br/>.= 
1

;<br/>


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