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<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E34">Th28</font></span>: <a NAME="T28"><span class="comment"><font color="firebrick">:: ROUGHS_2:28</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">R</font> being   non  <a href="struct_0.html#V2" title="STRUCT_0:attr.2">empty</a>   <a href="orders_2.html#L1" title="ORDERS_2:struct.1">RelStr</a>  holds   <a href="roughs_2.html#K5" title="ROUGHS_2:func.5">Flip</a> <span class="p1">(<span class="default"><a href="roughs_2.html#K3" title="ROUGHS_2:func.3">LAp</a> <font color="Olive" title="b1">R</font></span>)</span> <a href="funct_2.html#R2" title="FUNCT_2:pred.2">=</a>  <a href="roughs_2.html#K4" title="ROUGHS_2:func.4">UAp</a> <font color="Olive" title="b1">R</font></div></div>
