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<b>reconsider </b><font color="Maroon">xy</font> = <span class="p1"><a href="domain_1.html#K1">[</a><span class="default"><font color="Maroon">x</font>,<font color="Maroon">y</font></span><a href="domain_1.html#K1">]</a></span> as    <a href="subset_1.html#M1">Element</a> of <span class="p1"><a href="zfmisc_1.html#K2">[:</a><span class="default"><font color="Maroon">A</font>,<font color="Maroon">A</font></span><a href="zfmisc_1.html#K2">:]</a></span> ;<br/>
<a NAME="E2:28_1_1"/>
<font color="Maroon">f</font> <a href="funct_2.html#K3">.</a> <font color="Maroon">xy</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font>
 
;<br/>
<b>hence </b><a NAME="E3:28_1_1"/>
<font color="Maroon">f</font> <a href="binop_1.html#K1">.</a> <font color="Maroon">x</font>,<font color="Maroon">y</font> is   <a href="struct_0.html#NM1">Element</a> of <font color="Maroon">L</font>
 ;<br/>


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