MathGroup Archive 1996

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List help needed

  • To: mathgroup at
  • Subject: [mg5065] List help needed
  • From: John Rowney <jrowney at inetg1.Arco.COM>
  • Date: Fri, 25 Oct 1996 22:48:07 -0400
  • Organization: AIOGC-HQ
  • Sender: owner-wri-mathgroup at


I need a little help with lists.  What I would like to do is the

N by combining adjacent elements of the original list into sub lists. 
This might become clearer with an example.

Given {a,b,c,d,e} of length 5, ALL possible length 4 lists subject to
the conditions above are:

{{a,b},c,d,e}, {a,{b,c},d,e}, {a,b,{c,d},e} and {a,b,c,{d,e}}

two of the possible length 3 lists are

{a,{b,c,d},e} and {{a,b},c,{d,e}}

I hope you get the picture.

In the "real" problem, N would be around 20 and n would be around 10.

Thanks in advance

jrowney at

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