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A minimal area problem for nonvanishing functions
St. Petersburg Mathematical Journal
The minimal area covered by the image of the unit disk is found for nonvanishing univalent functions normalized by the conditions f (0) = 1, f (0) = α. Two different approaches are discussed, each of which contributes to the complete solution of the problem. The first approach reduces the problem, via symmetrization, to the class of typically real functions, where the well-known integral representation can be employed to obtain the solution upon a priori knowledge of the extremal function. Thedoi:10.1090/s1061-0022-06-00941-1 fatcat:r2xxay5gwzc2tkaxnd26idms6q