A sharp lower bound in the distortion theorem for the Sakaguchi class
A sharp lower bound is obtained for \(|f'(z)|\) in the class SSP of functions starlike with respect to symmetric points. As a consequence, some results, of whom some given by A. W. Goodman and F. Rønning, are improved both for SPP and the class of uniformly starlike functions.
starlike with respect to symmetric points
scientific article; zbMATH DE number 1423625