_{o}> 0 and ε

_{e}< 0. We are interested in the z = const and also rescale the radial coordinate by ρ = √ε

_{o}r such that equation which γ

^{2}= |ε

_{e}/ε

_{o}|. By considering the coordinate transformation X = ρ cosh γφ and Y = ρ sinh γφ, we can...