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<div><span class="kw">theorem </span><a NAME="T21"><span class="comment"><font color="firebrick">:: BINTREE2:21</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">T</font> being   <a href="bintree2.html#V1" title="BINTREE2:attr.1">full</a>  <a href="trees_1.html#NM1" title="TREES_1:NM.1">Tree</a><br/>  for <font color="Olive" title="b2">n</font> being   non  <a href="ordinal1.html#V8" title="ORDINAL1:attr.8">zero</a>  <a href="ordinal1.html#NM6" title="ORDINAL1:NM.6">Nat</a> holds   <a href="xtuple_0.html#K10" title="XTUPLE_0:func.10">rng</a> <span class="p1">(<span class="default"><a href="bintree2.html#K2" title="BINTREE2:func.2">FinSeqLevel</a> (<font color="Olive" title="b2">n</font>,<font color="Olive" title="b1">T</font>)</span>)</span> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <font color="Olive" title="b1">T</font> <a href="trees_2.html#K2" title="TREES_2:func.2">-level</a> <font color="Olive" title="b2">n</font></div></div>
