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MathGroup Archive 2004

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transforming exponential of sums into product of exponentials

  • To: mathgroup at smc.vnet.net
  • Subject: [mg48654] transforming exponential of sums into product of exponentials
  • From: "Karim Mehadhebi" <Karim.Mehadhebi at wanadoo.fr>
  • Date: Wed, 9 Jun 2004 04:17:34 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Dear All,

I can not understand why Mathmatica refuses to apply rules which transform
exponenials of sums into product of exponentails.

For instance,
f[x+y] /. f[a_ + b_]-> f[a] f[b] returns f[x] f[y],
whereas
Exp[x+y] /. Exp[a_+b_]->Exp[a]Exp[b] still returns Exp[x+y]

Any help greatly appreciated






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