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<b>let </b><font color="Maroon" title="c1">G</font> be  non <a href="struct_0.html#V2" title="STRUCT_0:attr.2">empty</a>  <a href="lang1.html#L1" title="LANG1:struct.1">DTConstrStr</a> ;<br/><b>let </b><font color="Maroon" title="c2">s</font> be   <a href="lang1.html#NM1" title="LANG1:NM.1">Symbol</a> of <font color="Maroon" title="c1">G</font>;<br/><b>let </b><font color="Maroon" title="c3">n</font>, <font color="Maroon" title="c4">n1</font>, <font color="Maroon" title="c5">n2</font> be   <a href="lang1.html#NM2" title="LANG1:NM.2">String</a> of <font color="Maroon" title="c1">G</font>;<br/>









<b>assume </b><a NAME="E1:14"/><i><font color="Green" title="E2">A1</font></i>: 
<font color="Maroon" title="c2">s</font> <a href="lang1.html#R1" title="LANG1:pred.1">==&gt;</a> <font color="Maroon" title="c3">n</font>
 ;<br/>

<b>take </b>
<font color="Maroon" title="c4">n1</font>
; <i><font color="Red">:: according to </font></i><a class="ref" href="lang1.html#D4" target="_self" title="LANG1:def.4">LANG1:def 4</a><br/>

<b>take </b>
<font color="Maroon" title="c5">n2</font>
;<br/>

<b>take </b>
<font color="Maroon" title="c3">n</font>
;<br/>

<b>take </b>
<font color="Maroon" title="c2">s</font>
;<br/>

<b>thus </b><a NAME="E2:14"/>
( <span class="p1">(<span class="default"><font color="Maroon" title="c4">n1</font> <a href="lang1.html#K1" title="LANG1:func.1">^</a> <span class="p2"><a href="lang1.html#K3" title="LANG1:func.3">&lt;*</a><span class="default"><font color="Maroon" title="c2">s</font></span><a href="lang1.html#K3" title="LANG1:func.3">*&gt;</a></span></span>)</span> <a href="lang1.html#K1" title="LANG1:func.1">^</a> <font color="Maroon" title="c5">n2</font> <a href="relset_1.html#R2" title="RELSET_1:pred.2">=</a> <span class="p1">(<span class="default"><font color="Maroon" title="c4">n1</font> <a href="lang1.html#K1" title="LANG1:func.1">^</a> <span class="p2"><a href="lang1.html#K3" title="LANG1:func.3">&lt;*</a><span class="default"><font color="Maroon" title="c2">s</font></span><a href="lang1.html#K3" title="LANG1:func.3">*&gt;</a></span></span>)</span> <a href="lang1.html#K1" title="LANG1:func.1">^</a> <font color="Maroon" title="c5">n2</font> &amp; <span class="p1">(<span class="default"><font color="Maroon" title="c4">n1</font> <a href="lang1.html#K1" title="LANG1:func.1">^</a> <font color="Maroon" title="c3">n</font></span>)</span> <a href="lang1.html#K1" title="LANG1:func.1">^</a> <font color="Maroon" title="c5">n2</font> <a href="relset_1.html#R2" title="RELSET_1:pred.2">=</a> <span class="p1">(<span class="default"><font color="Maroon" title="c4">n1</font> <a href="lang1.html#K1" title="LANG1:func.1">^</a> <font color="Maroon" title="c3">n</font></span>)</span> <a href="lang1.html#K1" title="LANG1:func.1">^</a> <font color="Maroon" title="c5">n2</font> &amp; <font color="Maroon" title="c2">s</font> <a href="lang1.html#R1" title="LANG1:pred.1">==&gt;</a> <font color="Maroon" title="c3">n</font> )
 <b>by </b><i><a class="txt" href="lang1.html#E1:14"><i><font color="Green" title="E2">A1</font></i></a></i>;<br/>


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