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]