Funny Behavior of InverseLaplaceTransform
- To: mathgroup at smc.vnet.net
- Subject: [mg48007] Funny Behavior of InverseLaplaceTransform
- From: "Husain Al-Mohssen" <husain at MIT.EDU>
- Date: Wed, 5 May 2004 08:11:13 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Hi Mathgroupers, I don't know what to make of the following behavior of InverseLaplaceTransform. To me it seems like a bug but I am not sure. Start with this: In[1]:= InverseLaplaceTransform[Log[a (s + ce )]/s, s, t] Out[1]= -\[Infinity] This looks a bit suspicious. Lets try re-writing it: In[2]:= PowerExpand[Log[a (s + ce)]/s] Out[2]= \!\(\(Log[a] + Log[s + ce]\)\/s\) Let's Try it one more time: In[3]:= InverseLaplaceTransform[%,s,t] Out[3]= EulerGamma+Gamma[0,t ce]+Log[a] Is this a bug or am I missing something here? I'd be very surprised if the QC of Mathematica allowed a bug like this in the 5.0 kernel. In[4]:= $Version Out[4]= 5.0 for Linux (November 18, 2003) Yours, Husain Al-Mohssen Course 2 (Mechanical Engineering)