<?xml version="1.0"?>
<div><span class="kw">theorem </span><span class="lab"><font color="Green" title="E3">Th4</font></span>: <a NAME="T4"><span class="comment"><font color="firebrick">:: OSALG_3:4</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#NM1" title="ORDERS_2:NM.1">Poset</a><br/>  for <font color="Olive" title="b2">A</font> being   <a href="osalg_1.html#NM4" title="OSALG_1:NM.4">OrderSortedSet</a> of <font color="Olive" title="b1">R</font> holds   <a href="msualg_3.html#K2" title="MSUALG_3:func.2">id</a> <font color="Olive" title="b2">A</font> is  <a href="osalg_3.html#V1" title="OSALG_3:attr.1">order-sorted</a> </div></div>
