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<a NAME="E1:18_1_1"/>
 <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a> , <a href="wellord2.html#K1" title="WELLORD2:func.1">RelIncl</a> <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  <a href="wellord1.html#R4" title="WELLORD1:pred.4">are_isomorphic</a> 
 
<b>by </b><i><a class="ref" href="wellord1.html#T48" title="WELLORD1:th.48">WELLORD1:48</a></i>;<br/>
<b>hence </b><a NAME="E2:18_1_1"/>
 <a href="wellord2.html#K2" title="WELLORD2:func.2">order_type_of</a> <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  is <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>
 <b>by </b><i><a class="ref" href="orders_1.html#T119" title="ORDERS_1:th.119">ORDERS_1:119</a>, <a class="ref" href="wellord2.html#D2" title="WELLORD2:def.2">WELLORD2:def 2</a></i>; <a class="txt" onclick="hs(this)" href="javascript:()"><i><font color="Red">::  thesis: </font></i></a><span class="hide"> verum</span><br/>


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