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<span class="p1">(<span class="default"><a href="pscomp_1.html#K16" title="PSCOMP_1:func.16">NW-corner</a> <font color="Maroon" title="c2">P</font></span>)</span> <a href="euclid.html#K21" title="EUCLID:func.21">`1</a>  = 
 <a href="pscomp_1.html#K11" title="PSCOMP_1:func.11">W-bound</a> <font color="Maroon" title="c2">P</font>
<b>by </b><i><a class="ref" href="euclid.html#T56" title="EUCLID:th.56">EUCLID:56</a></i>
<br/>.= 
<span class="p1">(<span class="default"><a href="pscomp_1.html#K15" title="PSCOMP_1:func.15">SW-corner</a> <font color="Maroon" title="c2">P</font></span>)</span> <a href="euclid.html#K21" title="EUCLID:func.21">`1</a> 
<b>by </b><i><a class="ref" href="euclid.html#T56" title="EUCLID:th.56">EUCLID:56</a></i>
;<br/>
<b>hence </b><a NAME="E2:13_2_1"/>
 <a href="topreal1.html#K3" title="TOPREAL1:func.3">LSeg</a> <span class="p1">(<span class="default"><a href="pscomp_1.html#K16" title="PSCOMP_1:func.16">NW-corner</a> <font color="Maroon" title="c2">P</font></span>)</span>,<span class="p1">(<span class="default"><a href="pscomp_1.html#K15" title="PSCOMP_1:func.15">SW-corner</a> <font color="Maroon" title="c2">P</font></span>)</span> is <a href="sppol_1.html#V2" title="SPPOL_1:attr.2">vertical</a>
 <b>by </b><i><a class="ref" href="sppol_1.html#T37" title="SPPOL_1:th.37">SPPOL_1:37</a></i>; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> verum</span><br/>


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