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<b>let </b><font color="Maroon" title="c1">s</font> be  <a href="sprect_1.html#V1" title="SPRECT_1:attr.1">rectangular</a> <a href="struct_0.html#NM7" title="STRUCT_0:NM.7">FinSequence</a> of <span class="p1">(<span class="default"><a href="euclid.html#K15" title="EUCLID:func.15">TOP-REAL</a> 2</span>)</span>;<br/>

<b>consider </b><font color="Maroon" title="c2">D</font> being  non <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a> <a href="compts_1.html#V6" title="COMPTS_1:attr.6">compact</a> non <a href="sppol_1.html#V1" title="SPPOL_1:attr.1">horizontal</a> non <a href="sppol_1.html#V2" title="SPPOL_1:attr.2">vertical</a> <a href="struct_0.html#NM2" title="STRUCT_0:NM.2">Subset</a> of <span class="p1">(<span class="default"><a href="euclid.html#K15" title="EUCLID:func.15">TOP-REAL</a> 2</span>)</span><b> such that </b><br/><a NAME="E2:112"/><i><font color="Green" title="E83">A1</font></i>: 
<font color="Maroon" title="c1">s</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="sprect_1.html#K1" title="SPRECT_1:func.1">SpStSeq</a> <font color="Maroon" title="c2">D</font>
 <b>by </b><i><a class="ref" href="sprect_1.html#D2" target="_self" title="SPRECT_1:def.2">Def2</a></i>;<br/>
<a NAME="E3:112"/><i><font color="Green" title="E84">A2</font></i>: 
<font color="Maroon" title="c1">s</font> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> 3 <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="pscomp_1.html#K20" title="PSCOMP_1:func.20">SE-corner</a> <font color="Maroon" title="c2">D</font>
 
<b>by </b><i><a class="txt" href="sprect_1.html#E2:112"><i><font color="Green" title="E83">A1</font></i></a>, <a class="ref" href="sprect_1.html#T39" target="_self" title="SPRECT_1:th.39">Th39</a></i>;<br/>
<b>hence </b><a NAME="E4:112"/>
<font color="Maroon" title="c1">s</font> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> 3 <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="pscomp_1.html#K31" title="PSCOMP_1:func.31">S-max</a> <span class="p1">(<span class="default"><a href="topreal1.html#K5" title="TOPREAL1:func.5">L~</a> <font color="Maroon" title="c1">s</font></span>)</span>
 <b>by </b><i><a class="txt" href="sprect_1.html#E2:112"><i><font color="Green" title="E83">A1</font></i></a>, <a class="ref" href="sprect_1.html#T89" target="_self" title="SPRECT_1:th.89">Th89</a></i>;<br/>

<b>thus </b><a NAME="E5:112"/>
<font color="Maroon" title="c1">s</font> <a href="partfun1.html#K7" title="PARTFUN1:func.7">/.</a> 3 <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a>  <a href="pscomp_1.html#K30" title="PSCOMP_1:func.30">E-min</a> <span class="p1">(<span class="default"><a href="topreal1.html#K5" title="TOPREAL1:func.5">L~</a> <font color="Maroon" title="c1">s</font></span>)</span>
 <b>by </b><i><a class="txt" href="sprect_1.html#E2:112"><i><font color="Green" title="E83">A1</font></i></a>, <a class="txt" href="sprect_1.html#E3:112"><i><font color="Green" title="E84">A2</font></i></a>, <a class="ref" href="sprect_1.html#T86" target="_self" title="SPRECT_1:th.86">Th86</a></i>;<br/>


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