<?xml version="1.0"?>
<div class="add">

<b>let </b><font color="Maroon">c<sub>1</sub></font> be  <a href="msualg_2.html#V2">all-with_const_op</a> <a href="osalg_1.html#NM3">OrderSortedSign</a>;<br/><b>let </b><font color="Maroon">c<sub>2</sub></font> be  <a href="msualg_1.html#V5">non-empty</a> <a href="osalg_1.html#NM5">OSAlgebra</a> of <font color="Maroon">c<sub>1</sub></font>;<br/><b>let </b><font color="Maroon">c<sub>3</sub></font> be  <a href="msualg_1.html#V5">non-empty</a> <a href="osalg_2.html#NM3">OSSubAlgebra</a> of <font color="Maroon">c<sub>2</sub></font>;<br/>





<a NAME="E1:27"/>
 <a href="msualg_2.html#K2">Constants</a> <font color="Maroon">c<sub>2</sub></font> <a href="pboole.html#R2">c=</a>  <a href="osalg_2.html#K3" target="_self">OSConstants</a> <font color="Maroon">c<sub>2</sub></font>
 
<b>by </b><i><a class="ref" href="osalg_2.html#T15" target="_self">Th15</a></i>;<br/>
<b>hence </b><a NAME="E2:27"/>
 <a href="osalg_2.html#K3" target="_self">OSConstants</a> <font color="Maroon">c<sub>2</sub></font> is  <a href="relat_1.html#V2">V5</a>  <a href="osalg_2.html#M2" target="_self">OSSubset</a> of <font color="Maroon">c<sub>3</sub></font>
 <b>by </b><i><a class="ref" href="osalg_2.html#T18" target="_self">Th18</a>, <a class="ref" href="pboole.html#T143">PBOOLE:143</a></i>;<br/>


</div>
