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# A singular Moser-Trudinger inequality for mean value zero functions in dimension two

Cornell University - arXiv
Aug 2020

Let $\Omega\subset\mathbb{R}^2$ be a smooth bounded domain with $0\in\partial\Omega$. In this paper, we prove that for any $\beta\in(0,1)$, the supremum $$\sup_{u\in W^{1,2}(\Omega), \int_\Omega u dx=0, \int_\Om|\nabla u|^2dx\leq1}\int_\Omega \frac{e^{2\pi(1-\beta) u^2}}{|x|^{2\beta}}dx$$ is finite and can be attained. This partially generalizes a well-known work of Alice Chang and Paul Yang \cite{CY88} who have obtained the inequality when $\beta=0$.

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