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How to "Factorize" expanded derivatives

  • To: mathgroup at smc.vnet.net
  • Subject: [mg17089] How to "Factorize" expanded derivatives
  • From: "Hemming A Schäffer" <has at dhi.dk>
  • Date: Sat, 17 Apr 1999 03:34:56 -0400
  • Organization: Customer at Tele Danmark Erhverv
  • Sender: owner-wri-mathgroup at wolfram.com

Consider the operation

D[f[x]g[x],x]=g[x]f'[x]+f[x]g'[x]

Does anyone know how to make Mathematica perform the inverse operation. I
guess what I am looking for is some kind of Simplify Function using
differentiation rules. Something resembling the Factor Function would also
be nice.

Thanks for any tips

Hemming






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