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Re: visualizing fields near charged objects



And what is the corresponding formula for "a" when it has
six neighbors (3-dim)? Suppose f and g are added in the phi
direction. I do not trust myself in trying to answer this
question on the basis of the general theoretical formula.
Ludwik Kowalski

John Mallinckrodt wrote:

On Fri, 9 Feb 2001, John Mallinckrodt wrote:

where r_a is the radial index for cell a. Setting the Laplacian =
0 and solving for a we get

a = (b+c+d+e)/4 + (c-e)/(2*r_a)

Oops! I should have said:

a = [ (b+c+d+e) + (c-e)/(2*r_a) ]/4