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<b>reconsider </b><font color="Maroon">Y</font> = the <a href="msualg_1.html#U4">Sorts</a> of <font color="Maroon">U1</font> as   <a href="osalg_1.html#NM4">OrderSortedSet</a> of <font color="Maroon">S</font> <b>by </b><i><a class="ref" href="osalg_1.html#T17">OSALG_1:17</a></i>;<br/>
<b>consider </b><font color="Maroon">X</font> being   <a href="osalg_4.html#NM2">OrderSortedRelation</a> of <font color="Maroon">Y</font>;<br/>
<b>reconsider </b><font color="Maroon">X1</font> = <font color="Maroon">X</font> as   <a href="msualg_4.html#NM4">ManySortedRelation</a> of <font color="Maroon">U1</font> ;<br/>
<b>take </b>
<font color="Maroon">X1</font>
;<br/>

<b>thus </b><a NAME="E4:8_1_1"/>
<font color="Maroon">X1</font> is <a href="osalg_4.html#V1" target="_self">os-compatible</a>
 ;<br/>


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