Mathematica 9 is now available
Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2007
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2007

[Date Index] [Thread Index] [Author Index]

Search the Archive

Integration variables

  • To: mathgroup at smc.vnet.net
  • Subject: [mg78307] Integration variables
  • From: mattew <m_manni_m at hotmail.com>
  • Date: Thu, 28 Jun 2007 04:20:02 -0400 (EDT)

Hi everybody, Mathematica gives us the possibility to use spherical coordinates (r,Ttheta,Pphi): I'm trying to write an integral in the polar angle Ttheta of the form:

Integral in [-1,1] Ttheta dCos(Ttheta)

where Ttheta is the polar angle and the integration variable is the cosine of Ttheta in the interval [-1,1].

I got the following error:

ntegrate::ivar: "Cos[Ttheta] is not a valid variable."

Does anyone knows the reason for that?

p.s: It happens with any system of coordinates, actually.


  • Prev by Date: delete a palette ?
  • Next by Date: Re: Re: extracting fractional powers of series expansion?
  • Previous by thread: Re: delete a palette ?
  • Next by thread: Re: Integration variables