Re: Principal Value integral
- To: mathgroup at smc.vnet.net
- Subject: [mg52411] Re: Principal Value integral
- From: Carlo Teubner <AskMeAndIllTellYou. at example.com>
- Date: Fri, 26 Nov 2004 01:04:44 -0500 (EST)
- Organization: Oxford University, England
- References: <co1fcm$smm$1@smc.vnet.net> <co4e0c$l94$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
That's highly strange. I'm using version 5.0.1 (student version) on Win
XP SP2. I just tried it again on a fresh kernel, gives the same wrong
result. Must be a bug peculiar to 5.0.1 then I guess... can anyone else
confirm this?
Carlo
>>The following Principal Value integral does not appear to give the
>>correct result.
>>
>>Integrate[1/(x^3-1), {x, -Infinity, Infinity}, PrincipalValue->True]
>>
>>This gives I Pi / 3, which surely can't be right since the answer should
>>be real.
>
>
> Using version 5.0, the result is correct: -Pi/Sqrt[3] .
> What version are you using?