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<b>consider </b><font color="Maroon">f</font> being   <a href="funct_2.html#NM1">Function</a> of  <a href="zf_lang.html#K1">VAR</a> ,<font color="Maroon">D</font>;<br/>
<a NAME="E2:10_1_1"/>
<font color="Maroon">f</font> <a href="hidden.html#R2">in</a>  <a href="zf_model.html#K3" target="_self">VAL</a> <font color="Maroon">D</font>
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E3:10_1_1"/>
not  <a href="zf_model.html#K3" target="_self">VAL</a> <font color="Maroon">D</font> is <a href="xboole_0.html#V1">empty</a>
 ;<br/>


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