Re: Bug in MuPAD 3.1/3/2.5 integration (Lupino+Cyber Tester)

From: Lupino (ask.me_at_if.youwant)
Date: 02/16/05 

Date: Wed, 16 Feb 2005 13:45:38 GMT

On Wed, 16 Feb 2005 05:18:21 -0800, Vladimir Bondarenko wrote:

Hi,

> Hi all,
>
> MuPAD 3.1 returns an invalid answer for a simple integral. The same for
> MuPAD 3 and MuPAD 2.5.

I don't know what MuPAD is, I think that belongs to the Maple package: I
don't know it, and I'm going to download maple this afternoon (assuming
that it's free and that there's a linux version).

>> int(sin(z)/(sin(z) + cos(z) + 2), z= 0..2*PI)
>
> (1 - I)*PI = 3.141592654 - 3.141592654*I
>
> The correct answer is
>
> PI*(1 - sqrt(2)) = -1.301290285
>
>
>> numeric::int(sin(z)/(sin(z) + cos(z) + 2), z= 0..2*PI)
>
> -1.301290285
>
>
> http://groups-beta.google.com/group/sci.math.symbolic/msg/bab8790c23e2afc4

Thanks for your answer, I'm going to read the message you pointed me to. 

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