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<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="qc_lang1.html#NM8">QC-formula</a>;<br/>

<b>assume </b><a NAME="E1:12"/><i><font color="Green">E4</font></i>: 
<font color="Maroon">c<sub>1</sub></font> is <a href="qc_lang1.html#V2">atomic</a>
 ;<br/>

<b>thus </b><a NAME="E2:12"/>
<font color="Maroon">H<sub>1</sub></font>(<font color="Maroon">c<sub>1</sub></font>) <a href="hidden.html#R1">=</a> <font color="Maroon">H<sub>2</sub></font>(<font color="Maroon">c<sub>1</sub></font>)
 <b>from </b><i><a class="ref" href="qc_lang3.html#S4" target="_self">QC_LANG3:sch 4</a>(<a class="txt" href="qc_lang3.html#E9"><i><font color="Green">Lemma1</font></i></a>, <a class="txt" href="qc_lang3.html#E1:12"><i><font color="Green">E4</font></i></a>);</i><br/>


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