Permutations of a sequence - variation 2
- To: mathgroup at smc.vnet.net
- Subject: [mg76175] Permutations of a sequence - variation 2
- From: Virgil Stokes <vs at it.uu.se>
- Date: Thu, 17 May 2007 06:01:16 -0400 (EDT)
Suppose I have a sequence:
{1,2,3,4,5}
and I would like to generate all permutations of this sequence with the
constraint that the last element not be the same as the first.
Thus,
{2,5,3,1,4}
is acceptable; but,
{2,5,3,4,1}
is not.
Are there Mathematica commands that allow this to be done efficiently
for a sequence {1,2,...,n}? Note, the solution of this problem can be
used to solve the earlier problem that I posted on sequence permutations.
--V. Stokes