MathGroup Archive 2001

[Date Index] [Thread Index] [Author Index]

Search the Archive

Possible Incorrect Summation

  • To: mathgroup at
  • Subject: [mg31034] Possible Incorrect Summation
  • From: Richard Palmer <mapsinc at>
  • Date: Fri, 5 Oct 2001 01:22:45 -0400 (EDT)
  • Sender: owner-wri-mathgroup at

I believe

    Sum[ (-1)^k Binomial[2 n, k] Binomial[2k, k] Binomial[4n - 2k, 2n -

 is a special case of Dixon's Identity and should equal Binomial[2n,n]^2.
Previously the SymbolicSum package returned a value which could be
simplified to the result.  The latest version of Mathematica returns a value
which is is not this result as can be seen by graphing the difference.  What
has changed?

  • Prev by Date: Re: latex
  • Next by Date: Frameticks
  • Previous by thread: Re: latex
  • Next by thread: Re: Possible Incorrect Summation