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<b>let </b><font color="Maroon">G</font> be  non <a href="struct_0.html#V3">empty</a>  <a href="lang1.html#L1" target="_self">DTConstrStr</a> ;<br/><b>let </b><font color="Maroon">s</font> be   <a href="lang1.html#NM1">Symbol</a> of <font color="Maroon">G</font>;<br/><b>let </b><font color="Maroon">n</font> be   <a href="lang1.html#NM2">String</a> of <font color="Maroon">G</font>;<br/>





<b>assume </b><a NAME="E1:15"/><i><font color="Green">E35</font></i>: 
<font color="Maroon">s</font> <a href="lang1.html#R1" target="_self">==&gt;</a> <font color="Maroon">n</font>
 ;<br/>

<b>take </b><font color="Maroon">n1</font> =  <a href="lang1.html#K2" target="_self">&lt;*&gt;</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">G</font>; <i><font color="Red">:: according to </font></i><a class="ref" href="lang1.html#D4" target="_self">LANG1:def 4</a><br/>

<b>take </b><font color="Maroon">n2</font> =  <a href="lang1.html#K2" target="_self">&lt;*&gt;</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">G</font>;<br/>

<b>take </b><font color="Maroon">n3</font> = <font color="Maroon">n</font>;<br/>

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

<b>thus </b><span class="p1"><a href="lang1.html#K3" target="_self">&lt;*</a><span class="default"><font color="Maroon">s</font></span><a href="lang1.html#K3" target="_self">*&gt;</a></span> = 
<font color="Maroon">n1</font> <a href="lang1.html#K1" target="_self">^</a> <span class="p1"><a href="lang1.html#K3" target="_self">&lt;*</a><span class="default"><font color="Maroon">s</font></span><a href="lang1.html#K3" target="_self">*&gt;</a></span>
<b>by </b><i><a class="ref" href="finseq_1.html#T47">FINSEQ_1:47</a></i>
<br/>.= 
<span class="p1">(<span class="default"><font color="Maroon">n1</font> <a href="lang1.html#K1" target="_self">^</a> <span class="p2"><a href="lang1.html#K3" target="_self">&lt;*</a><span class="default"><font color="Maroon">s</font></span><a href="lang1.html#K3" target="_self">*&gt;</a></span></span>)</span> <a href="lang1.html#K1" target="_self">^</a> <font color="Maroon">n2</font>
<b>by </b><i><a class="ref" href="finseq_1.html#T47">FINSEQ_1:47</a></i>
;<br/>

<b>thus </b><font color="Maroon">n</font> = 
<font color="Maroon">n1</font> <a href="lang1.html#K1" target="_self">^</a> <font color="Maroon">n3</font>
<b>by </b><i><a class="ref" href="finseq_1.html#T47">FINSEQ_1:47</a></i>
<br/>.= 
<span class="p1">(<span class="default"><font color="Maroon">n1</font> <a href="lang1.html#K1" target="_self">^</a> <font color="Maroon">n3</font></span>)</span> <a href="lang1.html#K1" target="_self">^</a> <font color="Maroon">n2</font>
<b>by </b><i><a class="ref" href="finseq_1.html#T47">FINSEQ_1:47</a></i>
;<br/>

<b>thus </b><a NAME="E4:15"/>
<font color="Maroon">s</font> <a href="lang1.html#R1" target="_self">==&gt;</a> <font color="Maroon">n3</font>
 <b>by </b><i/>;<br/>


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