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Jinxiu Mao

Publications and source records attributed to Jinxiu Mao.

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Laplace's equation with concave and convex boundary nonlinearities on an exterior region

This paper studies Laplace's equation $-Δ\,u=0$ in an exterior region $U\varsubsetneq{\mathbb R}^N$, when $N\geq3$, subject to the nonlinear boundary condition $\frac{\partial u}{\partialν}=λ{\left\vert{u}\right\vert}^{q-2}u+μ{\left\vert{u}\right\vert}^{p-2}u$ on $\partial U$ with $1 0$ and $μ\in\mathbb R$ arbitrary, then there exists a sequence $\left\{u_k\right\}$ of solutions with negative energy converging to $0$ as $k\to\infty$; on the other hand, when $λ\in\mathbb R$ and $μ>0$ arbitrary, then there exists a sequence $\left\{\tilde{u}_k\right\}$ of solutions with positive and unbounded energy. Also, associated with the $p$-Laplacian equation $-Δ_p\,u=0$, the exterior $p$-harmonic Steklov eigenvalue problems are described.

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