Services & Resources / Wolfram Forums / MathGroup Archive
-----

MathGroup Archive 2009

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Bug in LaplaceTransform?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg97754] Re: Bug in LaplaceTransform?
  • From: "Nasser Abbasi" <nma at 12000.org>
  • Date: Fri, 20 Mar 2009 02:42:24 -0500 (EST)
  • References: <gpsr23$mf1$1@smc.vnet.net>
  • Reply-to: "Nasser Abbasi" <nma at 12000.org>

"Wieland Brendel" <wielandbrendel at gmx.net> wrote in message 
news:gpsr23$mf1$1 at smc.vnet.net...
> Dear reader,
> how can it happen that Mathematica throws out -i for the Laplace
> transform of one,
>
> LaplaceTransform[1, t, I] = -i?
>
> After all the Laplace transformation (with s = I) is defined as
>
> Integrate[Exp[-I t], {t, 0, Infinity}]
>
> and should be undefined. Am I wrong or is this a bug?
>
> Thanks for an answer!
> Wieland
>

Laplace transform of 1 is 1/s, right?

So, if you used 'I' instead of 's', you get 1/I, right?

But 1/I = -I

So I think there is no bug here.

--Nasser 



  • Prev by Date: Incompatible units?
  • Next by Date: Re: Can Plot, can't FindRoot - what gives?
  • Previous by thread: Re: Bug in LaplaceTransform?
  • Next by thread: Re: Bug in LaplaceTransform?