Re: All permutations of a sequence

*To*: mathgroup at smc.vnet.net*Subject*: [mg76277] Re: All permutations of a sequence*From*: Dave Seaman <dseaman at no.such.host>*Date*: Fri, 18 May 2007 06:35:34 -0400 (EDT)*Organization*: Information Technology at Purdue*References*: <f2h8t7$v4$1@smc.vnet.net>

On Thu, 17 May 2007 09:56:55 +0000 (UTC), Virgil Stokes wrote: > I would like to get all unique permutations of a sequence (e.g. > {1,2,3,4,5,6,7,8,9,10,11,12,13}) with the constraint that all sequences > that have an opposite ordering are not included (e.g. {13, 12, > 11,10,9,8,6,5,4,3,2,1}) would not be included. > Are there some Mathematica commands that can be used to efficiently > generate these permutations? Surely every sequence has an opposite ordering, leaving you with nothing to list. -- Dave Seaman Oral Arguments in Mumia Abu-Jamal Case to be heard May 17 U.S. Court of Appeals, Third Circuit <http://www.abu-jamal-news.com/>