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LaplaceTransform bug?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg86241] LaplaceTransform bug?
  • From: janus <januswesenberg at gmail.com>
  • Date: Fri, 7 Mar 2008 02:23:37 -0500 (EST)

As far as I can tell, the bug illustrated by the example below has not
been reported in this group before.
Does anybody know wether it has been fixed in v6.0.1?

In[1]:= $Version

Out[1]= "6.0 for Mac OS X x86 (32-bit) (April 20, 2007)"

In[2]:= Clear[a, b, t, s];
LaplaceTransform[E^(a t) E^(b t), t, s] // InputForm

Out[3]//InputForm=
E^(b*t)/(-a + s)

In[4]:= Clear[a, b, t, s];
LaplaceTransform[E^((a + b) t), t, s] // InputForm

Out[5]//InputForm=
(-a - b + s)^(-1)


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