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Re: Re: Integrate Bug

  • To: mathgroup at smc.vnet.net
  • Subject: [mg100124] Re: [mg100097] Re: Integrate Bug
  • From: R Martinez <rm.tech at mac.com>
  • Date: Mon, 25 May 2009 06:18:44 -0400 (EDT)
  • References: <gv2jh5$97b$1@smc.vnet.net> <200905231033.GAA21687@smc.vnet.net>

Hello,

I also get 0 as the output with Mathematica 7.0.1 on a MacBook Pro  
running MacOSX 10.5.7.

Raul Martinez

On May 23, 2009, at 3:33 AM, lehin.p at gmail.com wrote:

> On 21 May, 07:58, Ney Lemke <ney.nle... at gmail.com> wrote:
>> I am trying to calculate this integral that should be positive.But  
>> the
>> answer is 0.
>>
>> In: Integrate[(1)/(z^2 + b^2 + a^2 - 2 z b Sin[\[Theta]] -
>>   2 a b Cos[\[Theta]])^(1/2), {\[Theta], 0, 2 \[Pi]},
>> Assumptions -> {a > 0, b > 0, z > 0}]
>>
>> Out:0
>>
>> Anybody have notice a situation like that?
>>
>> My platform is MacOSX 10.4 and Mathematica 7.
>>
>> Best wishes,
>
> Hello,
>
> I confirm this bug on Windows XP SP3 with Mathematica 7.0.1. And I can
> add that in version 5.2 this bug is absent (Mathematica 5.2 returns
> unevaluated input).
>



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