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<b>take </b>
 <a href="grcat_1.html#K7">id</a> <font color="Maroon">S</font>
;<br/>

<b>thus </b><a NAME="E1:6_1_1"/>
 <a href="grcat_1.html#K7">id</a> <font color="Maroon">S</font> is <a href="funct_1.html#V2">one-to-one</a>
 ;<br/>

<b>thus </b><a NAME="E2:6_1_1"/>
 <a href="relset_1.html#K5">rng</a> <span class="p1">(<span class="default"><a href="grcat_1.html#K7">id</a> <font color="Maroon">S</font></span>)</span> <a href="hidden.html#R1">=</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">S</font>
 <b>by </b><i><a class="ref" href="relat_1.html#T71">RELAT_1:71</a></i>; <i><font color="Red">:: according to </font></i><a class="ref" href="funct_2.html#D3">FUNCT_2:def 3</a><br/>


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