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<div><span class="kw">theorem </span><a NAME="T4"><span class="comment"><font color="firebrick">:: NTALGO_2:4</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">x</font> being   <a href="ordinal1.html#NM6" title="ORDINAL1:NM.6">Nat</a>  st 2 <a href="xxreal_0.html#R1" title="XXREAL_0:pred.1">&lt;=</a> <font color="Olive" title="b1">x</font> holds <br/>1 <a href="xxreal_0.html#NR3" title="XXREAL_0:NR.3">&lt;</a>  <a href="binari_6.html#K1" title="BINARI_6:func.1">LenBSeq</a> <font color="Olive" title="b1">x</font></div></div>
