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<b>let </b><font color="Maroon" title="c1">L</font> be  non <a href="struct_0.html#V3" title="STRUCT_0:attr.3">empty</a>  <a href="orders_2.html#L1" title="ORDERS_2:struct.1">RelStr</a> ;<br/>

<a NAME="E1:33"/>
 <a href="yellow_0.html#K3" title="YELLOW_0:func.3">Bottom</a> <font color="Maroon" title="c1">L</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a>  <a href="struct_0.html#K2" title="STRUCT_0:func.2">[#]</a> <font color="Maroon" title="c1">L</font>
 
;<br/>
<b>hence </b><a NAME="E2:33"/>
 <a href="struct_0.html#K2" title="STRUCT_0:func.2">[#]</a> <font color="Maroon" title="c1">L</font> is <a href="waybel23.html#V6" title="WAYBEL23:attr.6">with_bottom</a>
 <b>by </b><i><a class="ref" href="waybel23.html#D8" title="WAYBEL23:def.8">WAYBEL23:def 8</a></i>;<br/>

<a NAME="E3:33"/>
 <a href="yellow_0.html#K4" title="YELLOW_0:func.4">Top</a> <font color="Maroon" title="c1">L</font> <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a>  <a href="struct_0.html#K2" title="STRUCT_0:func.2">[#]</a> <font color="Maroon" title="c1">L</font>
 
;<br/>
<b>hence </b><a NAME="E4:33"/>
 <a href="struct_0.html#K2" title="STRUCT_0:func.2">[#]</a> <font color="Maroon" title="c1">L</font> is <a href="waybel23.html#V7" title="WAYBEL23:attr.7">with_top</a>
 <b>by </b><i><a class="ref" href="waybel23.html#D9" title="WAYBEL23:def.9">WAYBEL23:def 9</a></i>;<br/>


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