Re: A FullSimplify Problem
- To: mathgroup at smc.vnet.net
- Subject: [mg41070] Re: A FullSimplify Problem
- From: "Dr. Wolfgang Hintze" <weh at snafu.de>
- Date: Thu, 1 May 2003 04:57:52 -0400 (EDT)
- References: <b8o20k$p28$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Sorry, but my version 4.0 gives your simple answer immediately without any Simplify-ing. But also applying Simplify, and FullSimplify have no negative effect. These statements are of no help for you, of course. So perhaps these are: Check, if your output is complex (i.e. contains a non zero imaginary part). This might happen because the integrand has a branch cut singularity. You might be interested in the thread "Simplification of definite integral" which I initiated in this forum to find out more about Integrate. Regards, Wolfgang Ersek, Ted R wrote: > At http://mathworld.wolfram.com/LeibnizIntegralRule.html > I learned that > Integrate[Log[1-2a Cos[x]+a^2],{x,0,Pi}] > = 2*Pi*Log[Abs[a]] > > Mathematica knows how to do this integral, but gives a much more complicated > result. Can anyone explain how to use FullSimplify and other > transformations to show that the complicated result Mathematica gives is > equivalent to the answer above? > > Thanks, > Ted Ersek > > >