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Are robin boundary conditions ever used in electrostatics? I can find three references on the internet that say they are:

https://en.wikipedia.org/wiki/Uniqueness_theorem_for_Poisson%27s_equation

"Modified Neumann boundary condition (also called Robin boundary condition – conditions where boundaries are specified as conductors with known charges)"

https://www.springer.com/us/book/9783319631325 on page 9

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https://www.amazon.com/Electromagnetic-Field-Theory-Yaduvir-Singh-ebook/dp/B00LOBJT56 on page 122

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However, I don't understand this and I haven't been able to find any other more in depth explanations. It seems like these are references to the problem of a floating conductor or ground:

https://en.wikipedia.org/wiki/Floating_ground

but that does not actually involve a Robin boundary (I don't think). Am I missing something or are these sources wrong?

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