permutations?

*To*: mathgroup at smc.vnet.net*Subject*: [mg46466] permutations?*From*: sean_incali at yahoo.com (sean kim)*Date*: Thu, 19 Feb 2004 03:02:29 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

I think this is a permutation problem. but i'm not sure. do correct me. let's say you have... a, b, c, d, e and... a', b', c', d', e' what are the possible combination will go from a( or a' ) to e ( or e') so that you get... {a b c d e}, {a b c d e'}, {a b c d' e}, {a b c d' e'}, {a b c' d e}, { a b c' d' e}, {a, b, c' d e'}, {a, b, c' d' e'}....so on I have 32 from doing it the brute force way by hand. how do i do that with Mathematica? I don't think it's fully connected graph. because a only connects to downstream b or b' also... what kinda problem is described above? Thank you all very much in advance for any thoughts and comments. sean

**Follow-Ups**:**Re: permutations?***From:*"Sseziwa Mukasa,,(978) 536-2359" <mukasa@jeol.com>