more wrong integrals
- To: mathgroup at smc.vnet.net
- Subject: [mg24492] more wrong integrals
- From: Gianluca Gorni <gorni at dimi.uniud.it>
- Date: Thu, 20 Jul 2000 03:01:36 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Hello!
Here are two integrals in two variables that Mathematica 4 gets wrong:
Integrate[Cos[t]/r, {r, 0, 1}, {t, 0, Pi/2}] gives 0
Integrate[Cos[t]/r^2, {r, 0, 1}, {t, 0, Pi/2}] gives -1
although the functions are >0 in the integration region,
and the integrals diverge.
Regards,
Gianluca Gorni
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