1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Why does the following function equate to a delta in classical feild theory

  1. Oct 2, 2009 #1
    1. The problem statement, all variables and given/known data

    Can any one remember a decent argument/derivation for the following representation of the delta function.


    2. Relevant equations

    [tex]$ \nabla^2 \frac{1}{|r|} =\delta(r)$[/tex]

    (probally up to some multipicative constant [tex]$\frac{1}{2\pi}$[/tex] or something

    3. The attempt at a solution

    I know I've seen an agrument in jackson but I don't have a copy.
     
    Last edited: Oct 2, 2009
  2. jcsd
  3. Oct 2, 2009 #2
    I've no confidence that I've latexed that correctly and my work computer won't show me the symbols so heres the equation in equation again

    div(grad(1/|r|)) is proportional to deltafunction(r)
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook