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Re: Laplacian 2-D polar form

  • To: mathgroup at smc.vnet.net
  • Subject: [mg6962] Re: Laplacian 2-D polar form
  • From: Stephen P Luttrell <luttrell at signal.dra.hmg.gb>
  • Date: Wed, 30 Apr 1997 22:25:20 -0400 (EDT)
  • Organization: Defence Research Agency
  • Sender: owner-wri-mathgroup at wolfram.com

Sergio Rojas wrote:
> 
> (****
>         Hello folks,
> 
>   Using Mathematica 2.2 for DEC OSF/1 Alpha, I wrote a few lines
> to find the Laplacian 2-D polar form starting from its expression
> in  rectangular coordinates:
> ****)
> 

The following computes the Laplacian in cylindrical polar coordinates:

Needs["Calculus`VectorAnalysis`"]
SetCoordinates[Cylindrical[r,theta,z]]
Laplacian[f[r,theta,z]]

======================================================================

Dr Stephen P Luttrell                  luttrell at signal.dra.hmg.gb
Adaptive Systems Theory                01684-894046 (phone)
Room EX21, Defence Research Agency     01684-894384 (fax)           
Malvern, Worcs, WR14 3PS, U.K.        
http://www.dra.hmg.gb/cis5pip/Welcome.html


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