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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E21">Th15</font></span>: <a NAME="T15"><span class="comment"><font color="firebrick">:: LATTICE7:15</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">L</font> being   <a href="struct_0.html#V8" title="STRUCT_0:attr.8">finite</a>  <a href="waybel_0.html#NM8" title="WAYBEL_0:NM.8">LATTICE</a> holds   <a href="lattice7.html#K4" title="LATTICE7:func.4">LOWER</a> <span class="p1">(<span class="default"><a href="yellow_0.html#K5" title="YELLOW_0:func.5">subrelstr</a> <span class="p2">(<span class="default"><a href="lattice7.html#K3" title="LATTICE7:func.3">Join-IRR</a> <font color="Olive" title="b1">L</font></span>)</span></span>)</span> is    <a href="lattice7.html#M2" title="LATTICE7:mode.2">Ring_of_sets</a> </div></div>
