Re: More integration/ fullsimplify bugs in Mathematica 4.1
- To: mathgroup at smc.vnet.net
- Subject: [mg41664] Re: [mg41651] More integration/ fullsimplify bugs in Mathematica 4.1
- From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
- Date: Fri, 30 May 2003 03:56:14 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Well, we all know integration in 4.1 and also 4.2 is far from perfect. But with 5.0 just about to be released (and rumor has it that integration has been much improved) now may not be the ideal time to report these bugs. After all we know that nobody will be fixing these old versions, so I think it would be more profitable to wait and check if the bugs are still present in 5.0. Andrzej Kozlowski Yokohama, Japan http://www.mimuw.edu.pl/~akoz/ http://platon.c.u-tokyo.ac.jp/andrzej/ On Thursday, May 29, 2003, at 09:14 pm, Richard Fateman wrote: > Integrate[1/(a*x^2 + b*x + c/4)^n, x] > FullSimplify[%] > D[%,x] > InputForm[FullSimplify[%]] ==> > > (4^n*(-1 + n)*Gamma[1 - n]* > (-1 + (1/2 + (b + 2*a*x)/(2*Sqrt[b^2 - a*c]))^n* > (-1 + Gamma[2 - n])*Hypergeometric2F1Regularized[ > 1 - n, n, 2 - n, 1/2 - (b + 2*a*x)/ > (2*Sqrt[b^2 - a*c])]))/(c + 4*True*(b + a*True))^n > > notice the denominator has some variable "True" in it. > > Cheers. > RJF > > >