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<div><span class="kw">theorem </span><a NAME="T21"><span class="comment"><font color="firebrick">:: ORDERS_5:21</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">A</font> being    <a href="orders_2.html#L1" title="ORDERS_2:struct.1">RelStr</a> <br/>  for <font color="Olive" title="b2">a1</font>, <font color="Olive" title="b3">a2</font> being   <a href="struct_0.html#NM1" title="STRUCT_0:NM.1">Element</a> of <font color="Olive" title="b1">A</font>  st <font color="Olive" title="b2">a1</font> <a href="orders_2.html#R1" title="ORDERS_2:pred.1">&lt;=</a> <font color="Olive" title="b3">a2</font> holds <br/> not <font color="Olive" title="b1">A</font> is  <a href="struct_0.html#V2" title="STRUCT_0:attr.2">empty</a>  <span class="kw">by</span> <span class="lab"><a class="ref" href="orders_5.html#T20" target="_self" onmouseover="rs('orders_5/T20')" onmouseout="rh()">Th29</a></span>;<br/></div></div>
