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MathGroup Archive 2004

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Re: Integratecrashes kernel

  • To: mathgroup at smc.vnet.net
  • Subject: [mg50747] Re: Integratecrashes kernel
  • From: Bill Rowe <readnewsciv at earthlink.net>
  • Date: Sun, 19 Sep 2004 03:55:52 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

On 9/18/04 at 5:48 AM, math5bug at lmm.jussieu.fr (B. Oudoli) wrote:

>However, Integrate[x Cos[1. x], x]
>crashes the kernel, and it's impossible to abort or interrupt the
>calculation, which lasts forever.

This seems to be the case for me as well using Mathematica 5.0 on MacOS 10.3.5

>This bug appears in mathematica 5, but not in mathematica 4.

Have you reported it to Wolfram?

>I find it annoying that Integrate[] works for some real values of
>a, but not for some other ones for which the integral behaves
>perfectly well.

In this specific case

Integrate[x Cos[a x],x]

seems to work fine. So, you could do

Integrate[x Cos[a x],x]/.a->1
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