Re: Strange Laplace Transform in 6.0
- To: mathgroup at smc.vnet.net
- Subject: [mg81799] Re: Strange Laplace Transform in 6.0
- From: Fred Bartoli <mynamewithAdotinbetween at free.fr>
- Date: Wed, 3 Oct 2007 06:16:10 -0400 (EDT)
- References: <fdt58v$sp4$1@smc.vnet.net>
Le Tue, 02 Oct 2007 10:07:27 +0000, C. Seja a =C3=A9crit: > Hi, > > just have a look at this: > > Mathematica 5.2: > > In[3]:= > LaplaceTransform[Exp[x^2]*Exp[a*x],x,s] > > Out[3]= > \!\(1\/2\ \[ExponentialE]\^\(\(-\(1\/4\)\)\ \((a - s)\)\^2\)\ \@?\ > Erfi[1\/2\ \ > \((\(-a\) + s)\)]\) > > > Mathematica 6.0: > > In[1]:= LaplaceTransform[Exp[x^2]*Exp[a*x], x, s] Out[1]= > \[ExponentialE]^x^2/(-a + s) > > > Why does 6.0 give this result? Am I missing something? > Even more strange (6.0.1/Linux64): In[1]:= LaplaceTransform[Exp[x(x+a )],x,s] Out[1]= LaplaceTransform[1,x,-a+s-x] -- Thanks, Fred.