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| Science Forum Index » Education Forum » Wolfram Research QA process defect: Bug in Mathematica... |
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| Vladimir Bondarenko... |
 Posted: Sun Feb 03, 2008 12:56 am |
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Guest
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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.
As I wrote recently, there seems to be quite a common fallacy
that the VM machine can only identify the bugs in integrals,
limits, solvers, ODE solvers etc
Nothing could be further from the truth. While it is still too
early to discuss publicly the VM machine QA scope, to perturb a
bit the monotony, we pinpoint yet another simplification defect.
This example demonstrates YET ANOTHER case of bad defects in the
Wolfram Research Quality Assurance process. Consider, it cannot
trap and fix efficiently bugs the long livers...
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a = MeijerG[{{1/3, 2/3, 1, 1}, {}}, {{1/3, 2/3, 1, 1}, {}}, 1];
N[4/27 Pi^2 (9 + 2 Sqrt[3] Pi)]
N[ a ]
29.0719
29.0719
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FunctionExpand[a]
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VERSION OUTPUT RESOLUTION
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Mathematica 6.0 Indeterminate <----------------------- BUG #3
Mathematica 5.2 Keeps running after 100000 seconds <--- BUG #2
Mathematica 4.2 Indeterminate <----------------------- BUG #1
Mathematica 3.0 Indeterminate <----------------------- 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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"We must understand that technologies
like these are the way of the future."
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