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Symmetrization, green’s functions, harmonic measures and difference equations Pruss, Alexander Robert

Abstract

Symmetrization methods transform functions or sets into functions or sets having desirable features such as symmetry or some kind of convexity. We consider whether the values of various functionals do or do not increase under the transformation. First, we answer in the negative a question of W. K. Hayman (1967) on the precise way that Green's functions increase under circular rearrangement. Next we study symmetrization techniques in discrete cases, obtaining convolution-rearrangement inequalities of the form ...........

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