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<b>let </b><font color="Maroon">c<sub>1</sub></font> be   <a href="trees_1.html#NM1">Tree</a>;<br/>

<b>assume </b><a NAME="E1:19_1_1"/>
<font color="Maroon">c<sub>1</sub></font> is <a href="bintree2.html#V1" target="_self">full</a>
 ;<br/>

<a NAME="E2:19_1_1"/><b>then </b>
<font color="Maroon">c<sub>1</sub></font> <a href="hidden.html#R1">=</a> <span class="p1"><a href="domain_1.html#K7">{</a><span class="default">0,1</span><a href="domain_1.html#K7">}</a></span> <a href="finseq_2.html#K3">*</a> 
 
<b>by </b><i><a class="ref" href="bintree2.html#D2" target="_self">Def2</a></i>;<br/>
<b>hence </b><a NAME="E3:19_1_1"/>
<font color="Maroon">c<sub>1</sub></font> is <a href="bintree1.html#V1">binary</a>
 <b>by </b><i><a class="ref" href="bintree2.html#T3" target="_self">Th3</a></i>;<br/>


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