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Homework Statement
I want to prove that coefficients of potential are non-negative. i.e. Pij ≥ 0
Homework Equations
By coefficients of potential method we know that in a system of conductors the potential on ith conductor is related to charges on conductors by:
[itex]\Phi[/itex]i = [itex]\sum[/itex] Pij Qj
The Attempt at a Solution
It is written in Reitz and Milford that it is hard to prove in a rigorous way. I think that we should use Pii ≥ Pij.