Re: Strange results from Mathematica
- To: mathgroup at smc.vnet.net
- Subject: [mg75018] Re: Strange results from Mathematica
- From: "Raj" <rajanikanth at gmail.com>
- Date: Sat, 14 Apr 2007 01:09:31 -0400 (EDT)
- References: <evn8cr$s7$1@smc.vnet.net>
The Infinity in Mathematics starts with a capital I..so check if thats
the problem.
Cheers,
Raj
On Apr 12, 11:36 pm, "Jung-Tsung Shen" <jus... at gmail.com> wrote:
> Hi, I encountered a rather strange results from Mathematica today.
>
> When evaluating the following integration
>
> (1) Integrate[x (BesselJ[0, x])^2, {x,0, infinity}]
>
> my Mathematica gave the answer 0. That's very weird, since if you plot
> out the function x (BesselJ[0, x])^2, apparently the integral should
> not be zero ...
>
> Moreover, for the following integration
>
> (2) Integrate[ (BesselJ[0, x])^2, {x,0, infinity}]
>
> My Mathematica says it's some finite value. However, once you did
> this, and then did (1), and then came back to do (1), the answer
> became 0 ...
>
> My Mathematica version is 5.0.1.0 on Mac Powerbook.
>
> Thanks.
>
> JT