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<b>take </b>
<font color="Maroon">c<sub>1</sub></font> <a href="borsuk_1.html#K3">--&gt;</a> <span class="p1">(<span class="default"><a href="yellow_0.html#K4">Top</a> <font color="Maroon">c<sub>2</sub></font></span>)</span>
;<br/>

<b>thus </b><a NAME="E1:68_1_1"/>
( <font color="Maroon">c<sub>1</sub></font> <a href="borsuk_1.html#K3">--&gt;</a> <span class="p1">(<span class="default"><a href="yellow_0.html#K4">Top</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> is <a href="waybel_0.html#V22">directed-sups-preserving</a> &amp; <font color="Maroon">c<sub>1</sub></font> <a href="borsuk_1.html#K3">--&gt;</a> <span class="p1">(<span class="default"><a href="yellow_0.html#K4">Top</a> <font color="Maroon">c<sub>2</sub></font></span>)</span> is <a href="waybel_0.html#V17">infs-preserving</a> )
 ;<br/>


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