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MathGroup Archive 1997

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Re: Divergence and Dirac Delta Function

  • To: mathgroup at smc.vnet.net
  • Subject: [mg9184] Re: [mg9127] Divergence and Dirac Delta Function
  • From: "Alan Cobo-Lewis" <acobolew at peds.med.miami.edu>
  • Date: Tue, 21 Oct 1997 02:02:58 -0400
  • Sender: owner-wri-mathgroup at wolfram.com


> Axel Schwalm wrote:
> Dear Elvis,
> whether You get "1" or "4*Pi" as a result from considering vector 
> matters, depends on the unit-system You make use of (SI- or Gaussian 
> system, physically speaking).

Yes, except that Elvis Dieguez wrote:

> >if I tell Mathematica to compute the
> >divergence of:      unit vector(r) / r^2 it will return the value of
> >*zero.*

[italics added by Alan]



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