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Re: Laplace Transform Exponential Shift

  • To: mathgroup at smc.vnet.net
  • Subject: [mg96537] Re: Laplace Transform Exponential Shift
  • From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
  • Date: Mon, 16 Feb 2009 06:54:45 -0500 (EST)
  • Organization: The Open University, Milton Keynes, UK
  • References: <gn8j9t$7n7$1@smc.vnet.net>

In article <gn8j9t$7n7$1 at smc.vnet.net>,
 Bill Rowe <readnews at sbcglobal.net> wrote:

> On 2/14/09 at 3:08 AM, phbrf at t-online.de (Peter Breitfeld) wrote:
> 
> >Marc wrote:
> 
> >>InverseLaplaceTransform[Exp[a s],s,t]
> 
> >>is returned unevaluated!
> 
> >in V.7 this seems to work, returns 1/(t-a)
> 
> Hmm... Perhaps there is a platform dependency? On my system
> 
> (Out[6]= 7.0 for Mac OS X x86 (64-bit) (November 11, 2008))
> 
> InverseLaplaceTransform[Exp[a s],s,t]
> 
> is returned unevaluated

On my Win32 V7.0 too:

In[1]:= InverseLaplaceTransform[Exp[a s], s, t]

Out[1]= InverseLaplaceTransform[E^(a s), s, t]

In[2]:= {$Version, $ReleaseNumber}

Out[2]= {"7.0 for Microsoft Windows (32-bit) (November 10, 2008)", 0}


In[1]:= InverseLaplaceTransform[Exp[a s], s, t]

Out[1]= InverseLaplaceTransform[E^(a s), s, t]

In[2]:= {$Version, $ReleaseNumber}

Out[2]= {"6.0 for Mac OS X x86 (64-bit) (May 21, 2008)", 3}


Regards,
--Jean-Marc


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