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<div><span class="kw">theorem </span><a NAME="T73"><span class="comment"><font color="firebrick">:: NUMPOLY1:73</font></span><br/></a><div class="add"> for <font color="Olive" title="b1">n</font> being   <a href="ordinal1.html#NM6" title="ORDINAL1:NM.6">Nat</a> holds   <a href="numpoly1.html#K1" title="NUMPOLY1:func.1">Triangle</a> <font color="Olive" title="b1">n</font> <a href="hidden.html#R1" title="HIDDEN:pred.1">=</a> <span class="p1">(<span class="default"><font color="Olive" title="b1">n</font> <a href="xcmplx_0.html#K2" title="XCMPLX_0:func.2">+</a> 1</span>)</span> <a href="newton.html#K4" title="NEWTON:func.4">choose</a> 2</div></div>
