Abstract
Among the many contributions of Pólya to analysis, the following has always been Erdős’ favorite, both for the surprising result and for the beauty of its proof. Suppose that
is a complex polynomial of degree n ≥ 1 with leading coefficient 1. Associate with f(z) the set
that is, C is the set of points which are mapped under f into the circle of radius 2 around the origin in the complex plane. So for n = 1 the domain C is just a circular disk of diameter 4.
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References
P. L. Cebycev: Œuvres, Vol. I, Acad. Imperiale des Sciences, St. Peter burg 1899, pp. 387-469.
G. Pőlya: Beitrag zur Verallgemeinerung des Verzerrungssatzes auf mehrfai zusammenhängenden Gebieten, Sitzungsber. Preuss. Akad. Wiss. Berl (1928), 228-232; Collected Papers Vol. I, MIT Press 1974, 347-351.
G. Pőlya & G. Szegő: Problems and Theorems in Analysis, Vol. II, Springe Verlag, Berlin Heidelberg New York 1976; Reprint 1998.
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Aigner, M., Ziegler, G.M. (2001). A theorem of Pólya on polynomials. In: Proofs from THE BOOK. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-04315-8_17
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DOI: https://doi.org/10.1007/978-3-662-04315-8_17
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