Q: extract all k-tuple from a list of n elements

*To*: mathgroup at smc.vnet.net*Subject*: [mg49650] Q: extract all k-tuple from a list of n elements*From*: Klaus Duellmann <klaus.duellmann at arcor.de>*Date*: Mon, 26 Jul 2004 04:01:54 -0400 (EDT)*Sender*: owner-wri-mathgroup at wolfram.com

Question: How can I extract all k-tuple from a list of n elements (without considering permutations of the k-tuple)? Example: For the special case k=3 one solution would be Flatten[Table[{i, j, k}, {i, 1, n - 2}, {j, i + 1, n - 1}, {k, j + 1, n}], 2]; A generalization of this solution for all k >=1 would involve to create 'automatically' a table of dimension k, but how can this be implemented? Any help is appreciated. Regards, Klaus