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Re: sum over i+j+k==n

  • To: mathgroup at smc.vnet.net
  • Subject: [mg84453] Re: [mg84423] sum over i+j+k==n
  • From: Sseziwa Mukasa <mukasa at jeol.com>
  • Date: Tue, 25 Dec 2007 06:27:01 -0500 (EST)
  • References: <200712230936.EAA04032@smc.vnet.net>

On Dec 23, 2007, at 4:36 AM, Jack Kennedy wrote:

> Hi All,
> I often find myself needing to sum over triples
> (or other tuples) like i,j,k where i+j+k=n. Is there
> a convenient way to write this in Mathematica?
> Thanks,
> Jack
>
> (version 5.1)

I believe the Partitions function in Combinatorica gives you this  
list in version 5.


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