# How to find an electric potential in anisotropic, inhomogeneous medium

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 P: 1 Hello! (I am sorry for probable mistakes. English is not my native language. I have never written anything about mathematics and physics in English.) I have an electrostatic problem. I need to find an electric potential $\psi$ ($\vec{E}=-\nabla\psi$) in anisotropic, inhomogeneous medium. Let's introduce a cylindrical coordinate system ($\rho$, $\varphi$, z). The only source of the field is the linear charge on the endless thread: $\rho=\lambda\delta(\rho).$ Here $\rho$ is the volume charge density, $\lambda$ is a constant that describes the linear charge density. 1. If [itex]\rho

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