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Education > Science > Re: Bug in Math...
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Re: Bug in Mathematica 6 - NIntegrate - 5 (regression bug, invalid

by D Herring <dherring@[EMAIL PROTECTED] > Jan 27, 2008 at 01:17 PM

quasi wrote:
> On Sun, 27 Jan 2008 17:19:12 GMT, rjf <fateman@[EMAIL PROTECTED]
> wrote:
> 
>> Vladimir Bondarenko wrote:
>>> ----------------------------------------------------------------
>>>
>>> Our little demo continues..... Hello again from the VM machine
>>> which hopefully soon will not be ignored by CAS manufacturers.
>>>
>>> ----------------------------------------------------------------
>>>
>>> N[Integrate[Sin[z] BesselJ[1, z]/Sqrt[z + z^2], {z,0,Infinity}]]
>>>
>>>                    0.800192
>> This little demonstration illustrates how NOT to do re****ting of a bug.
.... [good stuff snipped]
> 
> I disagree. 
> 
> A bug is a reproducible erroneous output. 
> 
> No need to debug it. 
> 
> No need to find an explanation. 
> 
> The users who find the bug are the _customers_, not the employees.
> Simply re****t it and let the CAS vendor's sup****t people take it from
> there.

But here's the rub.

If you or I or any other random user finds a bug, we can say "I'm just 
a paying user -- the devs should ferret out the cause so I can get 
back to doing what I paid for."

VB claims to be more than that -- he claims to be a #1 tester of CAS 
software.  Such a person is expected to not only find bugs, but submit 
quality bug re****ts.  But he rarely does that; his re****ts are 
generally "ooh look; this didn't work as I expected" with little or no 
analysis.  And sometimes they show his expectations to be out of line 
with reality (e.g. floating-point problems are here to stay).

There's a normative difference in the source of these bug re****ts.

- Daniel
 




 6 Posts in Topic:
Re: Bug in Mathematica 6 - NIntegrate - 5 (regression bug, inval
rjf <fateman@[EMAIL PR  2008-01-27 17:19:12 
Re: Bug in Mathematica 6 - NIntegrate - 5 (regression bug, inval
quasi <quasi@[EMAIL PR  2008-01-27 12:39:30 
Re: Bug in Mathematica 6 - NIntegrate - 5 (regression bug, inval
D Herring <dherring@[E  2008-01-27 13:17:56 
Re: Bug in Mathematica 6 - NIntegrate - 5 (regression bug, inval
quasi <quasi@[EMAIL PR  2008-01-27 13:45:17 
Re: Bug in Mathematica 6 - NIntegrate - 5 (regression bug, inval
nano bagonghi <nano.ba  2008-01-27 21:05:32 
Re: Bug in Mathematica 6 - NIntegrate - 5 (regression bug, inval
quasi <quasi@[EMAIL PR  2008-01-27 15:52:42 

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tan12V112 Wed Aug 20 5:15:53 CDT 2008.