Re: Maybe it's me but the integrator at wolfram doesn't work very well
- To: mathgroup at smc.vnet.net
- Subject: [mg44980] Re: Maybe it's me but the integrator at wolfram doesn't work very well
- From: "David W. Cantrell" <DWCantrell at sigmaxi.org>
- Date: Fri, 12 Dec 2003 04:41:16 -0500 (EST)
- References: <br9i4v$d22$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
geoman <geogeo9090 at yahoo.com> wrote: "Maybe it's me..." Bingo! It's you! > Firstly the "integrator" tool at wolfram evaluates the indefinite > integral. Fine > > Here are some examples of incorrect answers of the "integrator" No, it gives correct answers for the items you mention. Perhaps you didn't bother to read "How to enter your input". If not, please do so now. > INT means the integral sign > > INT 1 / x ln x > > Don't feel bad though I found another site at mss.vanderbilt.edu that got > it wrong as well > > Now this is quite a fundamental integral but is it hopelessly botched by > the "integrator." > > Here is another > > INT ln x > > the "integrator" got that wrong as well. I did find a site that got it > right though. > > Where the error lies I don't know but do in fact think it may be > somewhere in the original mathematica code. > > BTW can anyone on this list give me the correct answers to the above Of course we could. But if you don't make the effort to read even the most obvious documentation, then I don't think we should. David