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<b>consider </b><font color="Maroon">c<sub>1</sub></font> being  non <a href="xboole_0.html#V1">empty</a>  <a href="hidden.html#M1">set</a> ;<br/>
<b>take </b>
 <a href="struct_0.html#G1" target="_self">1-sorted</a>(# <font color="Maroon">c<sub>1</sub></font> #)
;<br/>

<b>thus </b><a NAME="E2:4_1_1"/>
not the <a href="struct_0.html#U1" target="_self">carrier</a> of <a href="struct_0.html#G1" target="_self">1-sorted</a>(# <font color="Maroon">c<sub>1</sub></font> #) is <a href="xboole_0.html#V1">empty</a>
 ; <i><font color="Red">:: according to </font></i><a class="ref" href="struct_0.html#D1" target="_self">STRUCT_0:def 1</a><br/>


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