 |
|
| Science Forum Index » Education Forum » -- Wolfram Research QA process defect: Bug in... |
|
Page 1 of 1 |
|
| Author |
Message |
| Vladimir Bondarenko... |
 Posted: Sat Mar 01, 2008 8:04 pm |
|
|
|
Guest
|
-----------------------------------------------------------------
-- 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.
-----------------------------------------------------------------
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}]
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."
----------------------------------------------------------------- |
|
|
| Back to top |
|
|
|
|
|
All times are GMT - 5 Hours
The time now is Mon Mar 15, 2010 9:09 pm
|
|