Converse of the Maximum Modulus Theorem and Rings of Continuous Complex Functions
It is shown among others that if D is a region (öpen connected set) in the complex plane and C(D) the algehra of continuous complex functions on Dwith the property that for every m em ber/c C (D) and every closed disc M7 in D, ||/||^ r = ||/ ||g ^ then any two such regions are conformally equivalent. Moreover ev ery /is analytic.
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- Communications, Series A1:Mathematics and Statistics