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<a NAME="E1:5_1_1"/>
<font color="Maroon">nt</font> <a href="lang1.html#R1">==&gt;</a> <span class="p1"><a href="lang1.html#K4">&lt;*</a><span class="default"><span class="p2">(<span class="default"><a href="bintree1.html#K1">root-label</a> <font color="Maroon">tl</font></span>)</span>,<span class="p2">(<span class="default"><a href="bintree1.html#K1">root-label</a> <font color="Maroon">tr</font></span>)</span></span><a href="lang1.html#K4">*&gt;</a></span>
 
<b>by </b><i>, </i>;<br/>
<a NAME="E2:5_1_1"/><b>then </b>
<font color="Maroon">nt</font> <a href="lang1.html#R1">==&gt;</a>  <a href="trees_3.html#K16">roots</a> <span class="p1"><a href="lang1.html#K4">&lt;*</a><span class="default"><font color="Maroon">tl</font>,<font color="Maroon">tr</font></span><a href="lang1.html#K4">*&gt;</a></span>
 
<b>by </b><i><a class="ref" href="bintree1.html#T2">BINTREE1:2</a></i>;<br/>
<a NAME="E3:5_1_1"/><b>then </b>
<font color="Maroon">nt</font> <a href="trees_4.html#K4">-tree</a> <span class="p1"><a href="lang1.html#K4">&lt;*</a><span class="default"><font color="Maroon">tl</font>,<font color="Maroon">tr</font></span><a href="lang1.html#K4">*&gt;</a></span> <a href="hidden.html#R2">in</a>  <a href="dtconstr.html#K4">TS</a> <a href="scm_comp.html#K1" target="_self">SCM-AE</a> 
 
<b>by </b><i><a class="ref" href="dtconstr.html#D4">DTCONSTR:def 4</a></i>;<br/>
<b>hence </b><a NAME="E4:5_1_1"/>
<font color="Maroon">nt</font> <a href="trees_4.html#K6">-tree</a> <font color="Maroon">tl</font>,<font color="Maroon">tr</font> is   <a href="scm_comp.html#NM1">bin-term</a>
 <b>by </b><i><a class="ref" href="trees_4.html#D6">TREES_4:def 6</a></i>;<br/>


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