Re: A Problem with Integrate

*To*: mathgroup at smc.vnet.net*Subject*: [mg61923] Re: [mg61895] A Problem with Integrate*From*: "fizzy" <fizzycist at knology.net>*Date*: Fri, 4 Nov 2005 05:12:05 -0500 (EST)*References*: <200511031031.FAA27336@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

I tried this in 4.2 and get a result....whether its correct or not I dont know but you get an output with Ei functions....I'd like to add that I have tried other integrals, primarily definite integrals, that work in 4.2 but not in 5.2 or rather at least give an output in 4.2........ Jerry Blimbaum ----- Original Message ----- From: "Kevin J. McCann" <kmccann at umbc.edu> To: mathgroup at smc.vnet.net Subject: [mg61923] [mg61895] A Problem with Integrate > When I try the following indefinite integral: > > > Integrate[1/(E^t*(t^3*(-1 + Î¼*t))), t] > > under 5.2, I get > > Power::infy : Infinite expression 1/0^2 encountered. More ... > > 0 > > That is, it somehow gets 1/0^2, and returns an answer of zero. On the > other hand, if I leave out the exponential and just integrate > > Integrate[1/(t^3*(-1 + t*Î¼)), t] > > It works just fine. A plot of the integrand and a numerical integration > works, just the symbolic chokes. > > Any ideas would be appreciated. > > Thanks, > > Kevin > >

**References**:**A Problem with Integrate***From:*"Kevin J. McCann" <kmccann@umbc.edu>