Univalent Functions which Map Onto Regions of Given Transfinite Diameter

P. L. Duren, M. M. Schiffer
1991 Transactions of the American Mathematical Society  
By a variational method, the sharp upper bound is obtained for the second coefficients of normalized univalent functions which map the unit disk onto regions of prescribed transfinite diameter, or logarithmic capacity.
doi:10.2307/2001632 fatcat:rkiuy2iuvzdu7iidzb6mige75a