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arXiv 0912.0150math.AP
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一类非线性Schroedinger方程组正解的存在性和界

Existence and bounds of positive solutions for a nonlinear Schroedinger system

Benedetta Noris, Miguel Ramos

摘要:

证明了对任意实数$λ$,系统$-Δu +λu = u^3-βuv^2$,$ -Δv+λv =v^3-βvu^2$,$ u,v\in H^1_0(Ω),$,其中$Ω$是$R^3$的有界光滑整环,系统存在有界正解族$(u_β, v_β)$为$β\to +\infty$ .给出了弱差极限$u_β-v_β$节点集个数的上界.此外,对于$β>0$的任何足够大的固定值,系统允许无穷多个正解.

英文摘要:

We prove that, for any real $λ$, the system $-Δu +λu = u^3-βuv^2$, $ -Δv+λv =v^3-βvu^2$, $ u,v\in H^1_0(Ω),$ where $Ω$ is a bounded smooth domain of $R^3$, admits a bounded family of positive solutions $(u_β, v_β)$ as $β\to +\infty$. An upper bound on the number of nodal sets of the weak limits of difference $u_β-v_β$ is also provided. Moreover, for any sufficiently large fixed value of $β>0$ the system admits infinitely many positive solutions.

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