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MathGroup Archive 2004

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Derivative of Sum

  • To: mathgroup at
  • Subject: [mg47841] Derivative of Sum
  • From: "Michal Kvasnicka" <michal.kvasnicka at>
  • Date: Wed, 28 Apr 2004 06:56:35 -0400 (EDT)
  • Sender: owner-wri-mathgroup at

Is Mathematica 5 able to compute the folowing problem:
\!\(S = Sum[\(a\_k\) b\_k, {k, 1, n}]\)

then should be

\!\(\[PartialD]\_\(a\_i\)\ S = b\_i\) but the Mathematica gives 0.

Thanks, Michal

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