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If the same bugs exists through numerous software releases,
I think that is valuable public information.
It just should not happen.
-- Brad Cooper
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-- NOT FIXED BUGS ARE DANGEROUS: THEY TEND TO GET MORE SEVERE --
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Quality of CASs is our #1 care.
So our little demo continues.... Hello again from the VM machine
which hopefully soon will be used by CAS manufacturers to the
benefit of their customers.
This example demonstrates YET ANOTHER case of bad defects in the
Wolfram Research Quality Assurance process. Consider, it cannot
trap & fix efficiently regression bugs.
In 1996, Mathematica 3.0 returns a correct answer, instantly.
Then, the functionality is broken and never repaired.
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N[Sum[Cos[n]^5/n, {n, 1, Infinity}]]
-0.200798
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NSum[Cos[n]^5/n, {n, 1, Infinity}]
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VERSION OUTPUT RESOLUTION
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Mathematica 6.0 CRASH <---------------------------------- BUG
Mathematica 5.2 CRASH <---------------------------------- BUG
Mathematica 4.2 CRASH <---------------------------------- BUG
Mathematica 3.0 -0.200798 OK
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CRASH = No more memory available.
Mathematica kernel has shut down.
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NSum[Cos[n]^5/n^2, {n, 1, Infinity}]
No more memory available.
Mathematica kernel has shut down.
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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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"We must understand that technologies
like these are the way of the future."
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