Raymond Hettinger <[email protected]> added the comment:
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. _______________________________________ Python tracker <[email protected]> <http://bugs.python.org/issue4816> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
