Re: Integration - another Integer as a result
- To: mathgroup at smc.vnet.net
- Subject: [mg93760] Re: [mg93743] Integration - another Integer as a result
- From: DrMajorBob <btreat1 at austin.rr.com>
- Date: Tue, 25 Nov 2008 07:16:30 -0500 (EST)
- References: <200811241144.GAA16308@smc.vnet.net>
- Reply-to: drmajorbob at longhorns.com
Two problems:
(1) nPi is not the same as n Pi (similarly for mPi).
(2) the first link shows input and output in TraditionalForm, where Sin is
diplayed as sin. The Mathematica NAME of the function, however, is Sin.
Integrate[2 x Sin[n Pi x/L] Sin[m Pi x/L], x]
(1/(\[Pi]^2))L ((
L Cos[((m - n) \[Pi] x)/L] + (m - n) \[Pi] x Sin[((m - n) \[Pi] x)/
L])/(m - n)^2 - (
L Cos[((m + n) \[Pi] x)/L] + (m + n) \[Pi] x Sin[((m + n) \[Pi] x)/
L])/(m + n)^2)
Bobby
On Mon, 24 Nov 2008 05:44:28 -0600, MikeSw <sowasowa at o2.pl> wrote:
> Hello,
>
> I'm trying to calculate an integer using Mathematica, but instead of
> getting a "normal" result I get another Integer. The algorithm available
> on Wolfram website does this calculation with no problem:
>
> http://img156.imageshack.us/my.php?image=cakaqt6.jpg
>
> but Mathematica gives this:
>
> http://img156.imageshack.us/my.php?image=cakamtkmvk9.jpg
>
> I guess there is something wrong with the input?
>
--
DrMajorBob at longhorns.com
- References:
- Integration - another Integer as a result
- From: MikeSw <sowasowa@o2.pl>
- Integration - another Integer as a result