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)
  Home FAQ Contact Sign in
comp.softsys.math.maple only
 
Advanced search
POPULAR GROUPS

more...

 Up
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)         

Group: comp.softsys.math.maple · Group Profile
Author: rjf
Date: Mar 2, 2008 12:24

On Mar 1, 10:04 pm, Vladimir Bondarenko cybertester.com> wrote:
> -
>
> -----------------------------------------------------------------
>
> Integrate[Sin[z]/Sqrt[Sin[z]^4 + Cos[z]^4], {z, 0, Pi/2}]
>
>
Simplifying the input to integrate makes the bug disappear.
The denominator is sqrt(cos(4*z)+3)/2.

So it may be a bug, but perhaps a bug in the simplifier, not the
integrator. A
better bug reporter would distinguish the two cases. Perhaps an
automated bug
reporter is too unsophisticated to provide such information.
no comments
diggit! del.icio.us! reddit!

RELATED THREADS
SubjectArticles qty Group
cvs commit: src/tools/regression/usr.bin/sed regress.y.outmailing.freebsd.cvs ·