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<b>let </b><font color="Maroon" title="c1">p</font> be    <a href="subset_1.html#M2" title="SUBSET_1:mode.2">Element</a> of  <a href="cqc_lang.html#K4" title="CQC_LANG:func.4">CQC-WFF</a> ;<br/>

<b>assume </b><a NAME="E1:48"/>
<font color="Maroon" title="c1">p</font> is <a href="qc_lang1.html#V2" title="QC_LANG1:attr.2">atomic</a>
 ;<br/>

<a NAME="E2:48"/><b>then </b>
 ex <font color="Olive" title="b1">k</font> being   <a href="subset_1.html#M1" title="SUBSET_1:mode.1">Element</a> of  <a href="numbers.html#K5" title="NUMBERS:func.5">NAT</a>  ex <font color="Olive" title="b2">P</font> being  <a href="qc_lang1.html#NM6" title="QC_LANG1:NM.6">QC-pred_symbol</a> of <font color="Olive" title="b1">k</font> ex <font color="Olive" title="b3">ll</font> being  <a href="cqc_lang.html#NM2" title="CQC_LANG:NM.2">CQC-variable_list</a> of <font color="Olive" title="b1">k</font> st <font color="Maroon" title="c1">p</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Olive" title="b2">P</font> <a href="cqc_lang.html#K5" title="CQC_LANG:func.5">!</a> <font color="Olive" title="b3">ll</font>
 
<b>by </b><i><a class="ref" href="cqc_sim1.html#T5" target="_self" title="CQC_SIM1:th.5">Th5</a></i>;<br/>
<b>hence </b><a NAME="E3:48"/>
 <a href="cqc_sim1.html#K13" title="CQC_SIM1:func.13">SepVar</a> <font color="Maroon" title="c1">p</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Maroon" title="c1">p</font>
 <b>by </b><i><a class="ref" href="cqc_sim1.html#T27" target="_self" title="CQC_SIM1:th.27">Th27</a></i>;<br/>


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