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Article Contents

# Weighted Hardy-Littlewood-Sobolev inequalities and systems of integral equations

• In this paper, we consider systems of integral equations related to the weighted Hardy-Littlewood-Sobolev inequality. We present the symmetry, monotonity, and regularity of the solutions. In particular, we obtain the optimal integrability of the solutions to a class of such systems. We also present a simple method for the study of regularity, which has been extensively used in various forms. The version we present here contains some new developments. It is much more general and very easy to use. We believe the method will be helpful to both experts and non-experts in the field.
Mathematics Subject Classification: 35J99, 45E10, 45G05.

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