Vladimir Bondarenko wrote:
> -----------------------------------------------------------------
> -- NOT FIXED BUGS ARE DANGEROUS: THEY TEND TO GET MORE SEVERE --
> -----------------------------------------------------------------
>
> 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 and fix efficiently severe bugs.
What is the point of repeatidly quoting the above? Actually, I will take
the liberty of answering it for you by saying "none". There really is no
point in posting endless messages all of which start with the same text.
Why say in 100 words what you can usefully say in 10?
It's also unnecessary to copy to a large number of irrelavant
newsgroups. Is sci.math.symbolic not sufficient for you?
A somewhat shorter title than "Re: -- Wolfram Research QA process
defect: Bug in Mathematica 6 - Integrate - 93 (Sqrt, Sin, Cos, No more
memory available. Mathematica kernel has shut down., NEW regression
bug)" would also be benificial.
As a matter of interest, why the switch from Maple ba****ng to
Mathematica ba****ng?
> -----------------------------------------------------------------
>
> N[MeijerG[{{1/4,1/2,3/4},{}},{{0,0,1/2},{}},1]/(4 Sqrt[2] Pi^2)]
> NIntegrate[Sin[z]/Sqrt[Sin[z]^4 + Cos[z]^4], {z, 0, Pi/2}]
Finally, you get down the to the problem!
Have you considered open-sourcing your code? Parallel processing could
be used by getting a large number of people to hunt for bugs, in the
same way is projects like Seti
http://setiathome.berkeley.edu/
and the search for large Mersenne primes
http://www.mersenne.org/
make use of multiple computers. I assume to at least a certain extent
your search is limited by available processing power.
Have you thought of making a database of bugs available on the net? I
suspect there are open-source tools for this.
> 1.1935
>
> -----------------------------------------------------------------
>
> Integrate[Sin[z]/Sqrt[Sin[z]^4 + Cos[z]^4], {z, 0, Pi/2}]
>
> -----------------------------------------------------------------
> VERSION OUTPUT RESOLUTION
> -----------------------------------------------------------------
>
> Mathematica 6.0 CRASH <---------------------------------- BUG
>
> Mathematica 5.2 Correct answer (MeijerG -> 1.1935) OK
>
> Mathematica 4.2 Correct answer (MeijerG -> 1.1935) OK
>
> Mathematica 3.0 Correct answer (MeijerG -> 1.1935) OK
>
> -----------------------------------------------------------------
>
> CRASH = GUI: No more memory available.
> Mathematica kernel has shut down.
>
> CLI: Unexpectedly, MathKernel quits.
>
> -----------------------------------------------------------------
>
> 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
>
> -----------------------------------------------------------------
>
> "We must understand that technologies
> like these are the way of the future."
>
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