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MathGroup Archive 2002

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RE: Yet another bug in LaplaceTransform

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

Do you like this better?

$Version

"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 mail.strace.net] 
To: mathgroup at smc.vnet.net
Subject: [mg35211] [mg35199] Yet another bug in LaplaceTransform

Hello.

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,

    $Version

    "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)] +\
    (3/56)*p^2*Gamma[-(1/3)]*HypergeometricPFQ[{-(7/3)},\
    {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!
            

Best,

Vladimir Bondarenko







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