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| Science Forum Index » Education Forum » Wolfram Research QA process defect: Bug in Mathematica... |
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Page 1 of 1 |
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| Author |
Message |
| Vladimir Bondarenko... |
 Posted: Sun Jan 27, 2008 6:41 pm |
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Guest
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(***************************************************************)
If the same bugs exist through numerous software releases,
I think that is valuable public information.
It just should not happen.
-- Brad Cooper
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Daniel Lichtblau tells you how unprofessional I am. Small wonder.
Do not trust him. He is here as a hidden Wolfram Research sales
person talking to you -- to change your mind, to push Mathematica
sales -- as if he is just a non-biased applied mathematician, and
developer. The smaller I am, and the less professional I am, the
easier to softpedal all the Mathematica defects reported by us.
But I do not care about my (true or pretended) level in his eyes
a small red jammed cent. All this blah-blah-blah is really not of
a caliber to care for Cyber Tester about.
Deeds speak louder than words. Quality of Math is our #1 care.
So our little demo continues.... Hello again from the VM machine
which hopefully soon will not be ignored by CAS manufacturers.
This example demonstrates YET ANOTHER case of bad defects in
Wolfram Research Quality Assurance process. Consider, it cannot
trap efficiently bugs the long livers.
First, in 1996, Mathematica 3.0 returns a false result. This
bug persists in 2002, in Mathematica 4.2.
Then, in 2005, in Mathematica 5.2, this unfixed bug got worse
in severity -- it hogs all the memory. In Mathematica 6, this
memory hogging persists.
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N[Integrate[1/Sqrt[z^4 + z^3 + z^2 - z + 1], {z, 0, Infinity}]]
1.71331
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Integrate[1/Sqrt[z^4 + z^3 + z^2 - z + 1], {z, 0, Infinity}]
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VERSION OUTPUT RESOLUTION
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Mathematica 6.0 No more memory available. BUG #2
Mathematica kernel has shut down.
Mathematica 5.2 No more memory available.
Mathematica kernel has shut down. BUG #2
Mathematica 4.2 -1.71331 BUG #1
Mathematica 3.0 -1.71331 BUG #1
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Best wishes,
Vladimir Bondarenko
VM and GEMM architect
Co-founder, CEO, Mathematical Director
http://www.cybertester.com/ Cyber Tester, LLC
http://maple.bug-list.org/ Maple Bugs Encyclopaedia
http://www.CAS-testing.org/ CAS Testing
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