# Errata in “Conformal Mapping: Method and Applications” from Schinzinger

hi,

i'm studying the book "Conformal Mapping: Method and Applications" from Schinzinger and more precisely the chapter 6 concerning non-planar field. In section 6.1.3 the author proposes to solve a cylindrical laplace equation by solving a cartesian laplace equation via a conformal mapping of the polar plane.

I've joined the concerned pages.

At one point he says $\phi(u,\zeta)$ (the potential in the cartesian coordinates) verifies the cylindrical laplace equation, which i think is wrong and if it really so, the whole demonstration fails.