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RE: Yet another bug in LaplaceTransform

  • To: mathgroup at
  • Subject: [mg35211] RE: [mg35199] Yet another bug in LaplaceTransform
  • From: "DrBob" <majort at>
  • Date: Tue, 2 Jul 2002 02:12:19 -0400 (EDT)
  • Reply-to: <drbob at>
  • Sender: owner-wri-mathgroup at

Do you like this better?


"4.1 for Microsoft Windows (June 13, 2001)"

LaplaceTransform[Exp[-z^3]/z^10, z, p]

LaplaceTransform[1/(E^z^3*z^10), z, p]

Bobby Treat

-----Original Message-----
From: Vladimir Bondarenko [mailto:vvb at] 
To: mathgroup at
Subject: [mg35211] [mg35199] Yet another bug in LaplaceTransform


Alas, Mathematica 4.2 does sadly remind me Mathematica 3.0.
Something like a small breakthrough plus ocean of bugs
(as compared with the previous release).

In particular,


    "4.2 for Microsoft Windows (February 28, 2002)"

    LaplaceTransform[Exp[-z^3]/z^10, z, p]

    (Null*p^9)/(39366*Sqrt[3]*Pi) + (9/80)*p*Gamma[1/3]*\
    HypergeometricPFQ[{-(8/3)}, {2/3, 4/3}, -(p^3/27)] +\
    {4/3, 5/3}, -(p^3/27)]

Question 1. What is the origin of Null?

Question 2. What is the easiest workaround for this bug,
            that is how to calculate the correct answer?

Thank you for your help in advance!


Vladimir Bondarenko

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