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<b>let </b><font color="Maroon">S</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">OU0</font> be  <a href="msualg_1.html#V5">non-empty</a> <a href="osalg_1.html#NM5">OSAlgebra</a> of <font color="Maroon">S</font>;<br/><b>let </b><font color="Maroon">OU1</font> be  <a href="msualg_1.html#V5">non-empty</a> <a href="osalg_2.html#NM3">OSSubAlgebra</a> of <font color="Maroon">OU0</font>;<br/>





<a NAME="E1:27"/>
 <a href="msualg_2.html#K2">Constants</a> <font color="Maroon">OU0</font> <a href="pboole.html#R2">c=</a>  <a href="osalg_2.html#K3" target="_self">OSConstants</a> <font color="Maroon">OU0</font>
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E2:27"/>
 <a href="osalg_2.html#K3" target="_self">OSConstants</a> <font color="Maroon">OU0</font> is  <a href="relat_1.html#V2">V5</a>  <a href="osalg_2.html#M2" target="_self">OSSubset</a> of <font color="Maroon">OU1</font>
 <b>by </b><i>, <a class="ref" href="pboole.html#T143">PBOOLE:143</a></i>;<br/>


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