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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E30">Th30</font></span>: <a NAME="T30"><span class="comment"><font color="firebrick">:: ROBBINS3:30</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">L</font> being   non  <a href="struct_0.html#V2" title="STRUCT_0:attr.2">empty</a>   <a href="robbins1.html#L4" title="ROBBINS1:struct.4">OrthoLattStr</a>   st <font color="Olive" title="b1">L</font> is  <a href="lattices.html#V17" title="LATTICES:attr.17">Boolean</a>  &amp; <font color="Olive" title="b1">L</font> is  <a href="robbins1.html#V8" title="ROBBINS1:attr.8">well-complemented</a>  &amp; <font color="Olive" title="b1">L</font> is  <a href="lattices.html#V10" title="LATTICES:attr.10">Lattice-like</a>  holds <br/><font color="Olive" title="b1">L</font> is   <a href="robbins3.html#NM1" title="ROBBINS3:NM.1">Ortholattice</a></div></div>
