Chebyshev polynomials on equipotential curves

Erwin Miña-Díaz, Olof Rubin

For an analytic function $\varphi (z)$ with a Laurent expansion at $\infty$ of the form \begin{equation*} ϕ(z)=z+c_{0}+\frac{c_{1}}{z}+\frac{c_{2}}{z^{2}}+\cdots, \end{equation*} the Fabe…