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<a NAME="E1:20_1_1"/>
 <a href="xboole_0.html#K1">{}</a> , <a href="wellord2.html#K1">RelIncl</a> <a href="xboole_0.html#K1">{}</a>  <a href="wellord1.html#R4">are_isomorphic</a> 
 
<b>by </b><i><a class="ref" href="wellord1.html#T48">WELLORD1:48</a></i>;<br/>
<b>hence </b><a NAME="E2:20_1_1"/>
 <a href="wellord2.html#K2">order_type_of</a> <a href="xboole_0.html#K1">{}</a>  is <a href="xboole_0.html#V1">empty</a>
 <b>by </b><i><a class="ref" href="orders_1.html#T119">ORDERS_1:119</a>, <a class="ref" href="wellord2.html#D2">WELLORD2:def 2</a></i>;<br/>


</div>
