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<b>let </b><font color="Maroon">c<sub>1</sub></font> be    <a href="hidden.html#M1">set</a> ;<br/><b>let </b><font color="Maroon">c<sub>2</sub></font> be   <a href="orders_1.html#NM2">Order</a> of <font color="Maroon">c<sub>1</sub></font>;<br/>



<a NAME="E1:29"/>
<font color="Maroon">c<sub>2</sub></font> <a href="orders_1.html#NR2" target="_self">is_partial-order</a> 
 
<b>by </b><i><a class="ref" href="orders_1.html#D4" target="_self">Def4</a></i>;<br/>
<b>hence </b><a NAME="E2:29"/>
<font color="Maroon">c<sub>2</sub></font> <a href="orders_1.html#NR1" target="_self">is_quasi-order</a> 
 <b>by </b><i><a class="ref" href="orders_1.html#T109" target="_self">Th109</a></i>;<br/>


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