Author rhettinger
Recipients LambertDW, TFinley, mark.dickinson, rhettinger
Date 2009-01-07.22:53:04
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Excel is returning the count, not the set itself.  So, it could have
chosen to return zero.

The HP32SII also has nCr and nPr functions that return INVALID DATA for
r>n or r<0.

The Combinatorics section of CRC Standard Mathematical Formulae (30th
edition) defines nCr and nPr only for 0 <= r <= n.  The same is true in
Harris and Stocker's Handbook of Mathematics and Computational science.
Date User Action Args
2009-01-07 22:53:06rhettingersetrecipients: + rhettinger, mark.dickinson, LambertDW, TFinley
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