Re: InverseLaplaceTransform
- To: mathgroup at smc.vnet.net
- Subject: [mg100292] Re: InverseLaplaceTransform
- From: "Sjoerd C. de Vries" <sjoerd.c.devries at gmail.com>
- Date: Sun, 31 May 2009 06:34:35 -0400 (EDT)
- References: <gvq0aj$msg$1@smc.vnet.net>
Looks like a bug to me. For all u except -1 M[u] simplifies to 1 so the output should be DiracDelta[t] not 1/(E^t*2) Cheers -- Sjoerd On May 30, 2:57 am, andrea.cor... at gmail.com wrote: > OK, I give up on this one. Can anybody explain me the reason for these > two different outputs? > > Many many many thanks in advance! > > Andrea > > In[304] psi[u_] := LaplaceTransform[Exp[-t], t, u] > M[u_] := u*psi[u]/(1 - psi[u]) > InverseLaplaceTransform[M[u], u, t] > InverseLaplaceTransform[FullSimplify[M[u]], u, t] > > Out[306] 1/(E^t*2) > Out[307] DiracDelta[t]