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On a family of integral operators on the ball
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abstract
In this work, we transform the equation in the upper half space first studied by Caffarelli and Silvestre to an equation in the Euclidean unit ball $\mathbb{B}^n$. We identify the Poisson kernel for the equation in the unit ball. Using the Poisson kernel, we define the extension operator. We prove an extension inequality in the limit case and prove the uniqueness of the extremal functions in the limit case using the method of moving spheres. In addition we offer an interpretation of the limit case inequality as a conformally invariant generalization of Carleman's inequality.
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Cited by 1 Pith paper
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Sharp weighted Carleman and Huber isoperimetric inequalities on the unit ball in higher dimensions
New sharp weighted Carleman inequalities with extremal classification are proved in all dimensions, and a sharp weighted Huber isoperimetric inequality is established in even dimensions.
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