
#1
Feb311, 01:10 PM

P: 31

I don't seem to grasp the meaning of boundary conditions for Laplace's equation.
Consider the Lagendre expansion of the potential at x due to a unit charge 1/xx', where x' is the position of the unit point charge. To do the expansion, we need to consider a volume in space where the potential satisfies the Laplace equation. I can see that the potential satisfies Laplaces equation anywhere in space except at x=x', but what are the boundary conditions? Don't we have to know the potential at x=x', which is a boundary? 



#2
Feb411, 04:27 AM

P: 31

Am I too vague in my question?



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