<?xml version="1.0"?>
<div class="add">

<a NAME="E1:65_1_1"/>
not  <a href="xboole_0.html#K1" title="XBOOLE_0:func.1">{}</a>  <a href="hidden.html#R2" title="HIDDEN:pred.2">in</a>  <a href="relset_1.html#K5" title="RELSET_1:func.5">rng</a> <font color="Maroon" title="c3">f</font>
 
<b>by </b><i><a class="ref" href="setfam_1.html#D9" title="SETFAM_1:def.9">SETFAM_1:def 9</a></i>;<br/>
<b>hence </b><a NAME="E2:65_1_1"/>
not  <a href="card_3.html#K4" title="CARD_3:func.4">product</a> <font color="Maroon" title="c3">f</font> is <a href="xboole_0.html#V1" title="XBOOLE_0:attr.1">empty</a>
 <b>by </b><i><a class="ref" href="card_3.html#T37" target="_self" title="CARD_3:th.37">Th37</a></i>;<br/>


</div>
