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partitions

  • To: mathgroup at smc.vnet.net
  • Subject: [mg24526] partitions
  • From: Jose Prado de Melo <jpmelo at iconet.com.br>
  • Date: Mon, 24 Jul 2000 03:04:07 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Hi! MathGroup.
I'm a new user of Mathematica 3.0.
I'm looking for the solution of this problem:
How many ways, can the set {A,B,C,D,E} be separated into two parts with
three elements in each?
For example, ABF | CDE represents one way to do this, and is considered
the same as CDE | ABF, but ACD | BEF is diferent. In this case the
solution is 10.
Another example: Find all of the partitions of {A,B,C,D,E,F} into
three-element parts of 2,2,2. You should find 15 partitions.
How can I generate all these solutions using Mathematica 3.0?
Thanks!



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