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

<b>assume </b><a NAME="E1:16"/><i><font color="Green">E39</font></i>: 
<font color="Maroon">p</font> is <a href="qc_lang1.html#V4">conjunctive</a>
 ;<br/>

<a NAME="E2:16"/>
for <font color="Olive">d1</font>, <font color="Olive">d2</font> being  <a href="subset_1.html#NM2">Subset</a> of <a href="qc_lang1.html#K2">bound_QC-variables</a>   st <font color="Olive">d1</font> <a href="hidden.html#R1">=</a> <font color="Maroon">H<sub>1</sub></font>( <a href="qc_lang1.html#K18">the_left_argument_of</a> <font color="Maroon">p</font>) &amp; <font color="Olive">d2</font> <a href="hidden.html#R1">=</a> <font color="Maroon">H<sub>1</sub></font>( <a href="qc_lang1.html#K19">the_right_argument_of</a> <font color="Maroon">p</font>) holds <br/><font color="Maroon">H<sub>1</sub></font>(<font color="Maroon">p</font>) <a href="hidden.html#R1">=</a> <font color="Maroon">H<sub>4</sub></font>(<font color="Olive">d1</font>,<font color="Olive">d2</font>)
 
<b>from </b><i><a class="ref" href="qc_lang3.html#S6" target="_self">QC_LANG3:sch 6</a>(, );<br/></i>
<b>hence </b><a NAME="E3:16"/>
 <a href="qc_lang1.html#K23">still_not-bound_in</a> <font color="Maroon">p</font> <a href="hidden.html#R1">=</a> <span class="p1">(<span class="default"><a href="qc_lang1.html#K23">still_not-bound_in</a> <span class="p2">(<span class="default"><a href="qc_lang1.html#K18">the_left_argument_of</a> <font color="Maroon">p</font></span>)</span></span>)</span> <a href="subset_1.html#K4">\/</a> <span class="p1">(<span class="default"><a href="qc_lang1.html#K23">still_not-bound_in</a> <span class="p2">(<span class="default"><a href="qc_lang1.html#K19">the_right_argument_of</a> <font color="Maroon">p</font></span>)</span></span>)</span>
 ;<br/>


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