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MathGroup Archive 1997

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wrong divergence?!?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg6346] wrong divergence?!?
  • From: peter <psalzman at landau.ucdavis.edu>
  • Date: Thu, 13 Mar 1997 01:19:54 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

hi all

when i take the divergence of:

  e = {q/r^2, 0, 0}

i get zero.  i remembered to load VectorAnalysis and SetCoordinates to 
Spherical.

this is the electric field due to a point charge at the origin.  even 
though MMA doesn't know maxwell's equations, if we strip all the physical 
meaning from this vector field, shouldn't the divergence be something other 
than zero at the origin?

thanks!

peter
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