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)
• 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*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?

Best,
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