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

• To: mathgroup at smc.vnet.net
• Subject: [mg46909] Mathematica 5: Integration bug in quadratic found by the GEMM machine
• From: Vladimir Bondarenko <vvb at mail.strace.net>
• Date: Sun, 14 Mar 2004 23:54:24 -0500 (EST)
• Reply-to: Vladimir Bondarenko <vvb at mail.strace.net>
• Sender: owner-wri-mathgroup at wolfram.com

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/

• Follow-Ups:
  • Re: Mathematica 5: Integration bug in quadratic found by the GEMM machine
    • From: Andrzej Kozlowski <akoz@mimuw.edu.pl>