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<b>let </b><font color="Maroon">c<sub>3</sub></font> be   <a href="subset_1.html#NM2">Subset</a> of <span class="p1"><a href="zfmisc_1.html#K2">[:</a><span class="default"><font color="Maroon">c<sub>1</sub></font>,<font color="Maroon">c<sub>2</sub></font></span><a href="zfmisc_1.html#K2">:]</a></span>;<br/>

<a NAME="E1:3_1_1"/>
<span class="p1"><a href="zfmisc_1.html#K2">[:</a><span class="default"><font color="Maroon">c<sub>1</sub></font>,<font color="Maroon">c<sub>2</sub></font></span><a href="zfmisc_1.html#K2">:]</a></span> is <a href="relat_1.html#V1">Relation-like</a>
 
<b>by </b><i><a class="ref" href="relat_1.html#T6">RELAT_1:6</a></i>;<br/>
<b>hence </b><a NAME="E2:3_1_1"/>
<font color="Maroon">c<sub>3</sub></font> is <a href="relat_1.html#V1">Relation-like</a>
 <b>by </b><i><a class="ref" href="relat_1.html#T3">RELAT_1:3</a></i>;<br/>


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