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

<a NAME="E1:19_1_1"/>
 <a href="zf_lang.html#K8" target="_self">All</a> <font color="Maroon">x</font>,<font color="Maroon">H</font> is <a href="zf_lang.html#V1" target="_self">ZF-formula-like</a>
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="19_1_1_1"><b>proof </b></a><div class="add">

<a NAME="E1:19_1_1_1"/>
<font color="Maroon">H</font> is    <a href="subset_1.html#M1">Element</a> of  <a href="zf_lang.html#K9" target="_self">WFF</a> 
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E2:19_1_1_1"/>
 <a href="zf_lang.html#K8" target="_self">All</a> <font color="Maroon">x</font>,<font color="Maroon">H</font> is    <a href="subset_1.html#M1">Element</a> of  <a href="zf_lang.html#K9" target="_self">WFF</a> 
 <b>by </b><i/>; <i><font color="Red">:: according to </font></i><a class="ref" href="zf_lang.html#D9" target="_self">ZF_LANG:def 9</a><br/>


</div><b>end;</b></div>
<b>hence </b><a NAME="E2:19_1_1"/>
 <a href="zf_lang.html#K8" target="_self">All</a> <font color="Maroon">x</font>,<font color="Maroon">H</font> is <a href="zf_lang.html#V1" target="_self">ZF-formula-like</a>
 ;<br/>


</div>
