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MathGroup Archive 2007

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RE: Diferent solution of integral in versions 4 and 5...

  • To: mathgroup at smc.vnet.net
  • Subject: [mg73536] RE: Diferent solution of integral in versions 4 and 5...
  • From: "vromero" <vromero at ucaribe.edu.mx>
  • Date: Wed, 21 Feb 2007 01:49:55 -0500 (EST)

Hello,
I tried the following integral:

Integrate[Exp[-I k3 x3]/(k12^2 + k3^2)^2,{k3,-Infinity,Infinity},
Assumptions -> k12!=0 && Im[k12] == 0 && Im[k3] == 0 && Im[x3] == 0]

The result in version 5 is

(Abs[k12]*MeijerG[{{1/2}, {}}, {{0, 1/2, 3/2}, {}},
(-(1/4))*k12^2*x3^2])/(k12^4*Sqrt[Pi])

But in version 4 is

(1 + Abs[k12] Abs[x3]) / Abs[k12]^2 * Exp[- Abs[k12] Abs[x3]]

How can I get last result from version 5?

Thanks in advance...

Victor Romero




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