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Referring to this:...
Q1=C11*V1 + C12*V2 + C13*V3
Q2=C21*V1 + C22*V2 + C23*V3 (Equations 2)
Q3=C31*V1 + C32*V2 + C33*V3
John wrote:
> You will discover the following facts, which will soon come in handy:
>
> Gauge invariance requires Cij to be symmetric:
> Cij = Cji (equation 3)
>
> Charge conservation requires each row (and/or column) to sum to zero
> SUM_j Cij = 0 for all i (equation 4)
> assuming (!) the sum runs over all relevant objects.
2) I am not sure I understand the last line in the above quote.
conservation of charges?
Equation 3 reminds of
Newton's third law. The influence of object 2 on object 1
is as strong as the influence of object 1 on object 2.