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MathGroup Archive 2004

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Re: Mathematica 5: Integration bug in quadratic found by the GEMM machine

  • To: mathgroup at smc.vnet.net
  • Subject: [mg46923] Re: Mathematica 5: Integration bug in quadratic found by the GEMM machine
  • From: drbob at bigfoot.com (Bobby R. Treat)
  • Date: Tue, 16 Mar 2004 02:37:28 -0500 (EST)
  • References: <c33da8$fsi$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Version 5.0.1 gets it right.

Bobby

Vladimir Bondarenko <vvb at mail.strace.net> wrote in message news:<c33da8$fsi$1 at smc.vnet.net>...
> Hello,
> 
> Here is, just of pure curiosity, a sample from my GEMM machine:
> 
> 
> $Version
> 
> 5.0 for Microsoft Windows (June 11, 2003)
> 
> Integrate[1/(-2 z^2 + 3 z - 1), {z, -1, 0}]
> 
> Log[3/2]     // invalid answer
> 
> 0.405465
> 
> NIntegrate[1/(-2*z^2 + 3*z - 1), {z, -1, 0}]
> 
> -0.405465
> 
> 
> But the above is just a good opportunity: actually, ' am writing
> here to announce the next good piece of news: a massive flow of
> never published bug reports on a certain system is coming within
> several next days after which we will operate at a new level
> of speed; he who watches the activity knows well what I mean.
> 
> 
> Best wishes,
> 
> Vladimir Bondarenko
> 
> http://www.cybertester.com/
> http://www.CAS-testing.org/


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