permutations

*To*: mathgroup at smc.vnet.net*Subject*: [mg62418] permutations*From*: Francisco Gutierrez <fgutiers2002 at yahoo.com>*Date*: Wed, 23 Nov 2005 06:27:29 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

Dear Group: If I do for example: Permutations[{x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12}], my computer runs out of memory. This is not such a poor computer. Actually, I would need to do permutations of lists of Length 20, perhaps 25. I am aware these calculations are big (Length[x]!), but I wonder if there is some way around the problem. Compilating Permutations? But then how? Can somebody help me? Francisco Gutiérrez

**Follow-Ups**:**Re: permutations***From:*Igor Antonio <igora@wolf-ram.com>

**Re: permutations***From:*Andrzej Kozlowski <akoz@mimuw.edu.pl>