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<b>consider </b><font color="Maroon" title="c1">S0</font> being  non <a href="struct_0.html#V2" title="STRUCT_0:attr.2">empty</a> non <a href="msualg_1.html#V2" title="MSUALG_1:attr.2">void</a>  <a href="msualg_1.html#L1" title="MSUALG_1:struct.1">ManySortedSign</a> ;<br/>
<b>take </b><font color="Maroon" title="c2">s</font> =  <a href="osalg_1.html#K2" title="OSALG_1:func.2">OSSign</a> <font color="Maroon" title="c1">S0</font>;<br/>

<b>thus </b><a NAME="E2:21_1_1"/>
( <font color="Maroon" title="c2">s</font> is <a href="orders_3.html#V1" title="ORDERS_3:attr.1">discrete</a> &amp; <font color="Maroon" title="c2">s</font> is <a href="osalg_1.html#V6" title="OSALG_1:attr.6">op-discrete</a> )
 <b>by </b><i><a class="ref" href="osalg_1.html#T5" target="_self" title="OSALG_1:th.5">Th5</a></i>;<br/>

<b>hence </b><a NAME="E3:21_1_1"/>
<font color="Maroon" title="c2">s</font> is <a href="osalg_1.html#V5" title="OSALG_1:attr.5">discernable</a>
 <b>by </b><i><a class="ref" href="osalg_1.html#T4" target="_self" title="OSALG_1:th.4">Th4</a></i>;<br/>


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