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arXiv 1804.03324math.AP
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一类带位势的分数阶Schrodinger方程的多解性

Multiple solutions for a fractional Schrodinger equation with potentials

Sofiane Khoutir

摘要:

研究了一类非线性分数阶薛定谔方程:\begin{equation*} (-Δ)^{s}u+V(x)u=f(x,u), \quad \text{in}\: \mathbb{R}^{N}, \end{equation*},其中$s\in (0,1)$,$\ N>2s$,$(-Δ)^{s}$表示分数阶拉普拉斯算子.首先,通过使用变分方法,我们建立了上述方程的至少一个非平凡解的存在性与一般的潜在$V(x)$,允许是符号变化和次线性非线性$f(x,u)$。其次,利用变分方法和Moser迭代技巧,证明了当$V(x)$是非负位势且非线性项$f(x,u)$关于$u$是局部次线性时,方程无穷多解的存在性.

英文摘要:

This paper is devoted to study a class of nonlinear fractional Schrödinger equations: \begin{equation*} (-Δ)^{s}u+V(x)u=f(x,u), \quad \text{in}\: \mathbb{R}^{N}, \end{equation*} where $s\in (0,1)$, $\ N>2s$, $(-Δ)^{s}$ stands for the fractional Laplacian. First, by using a variational approach, we establish the existence of at least one nontrivial solution for the above equation with a general potential $V(x)$ which is allowed to be sign-changing and a sublinear nonlinearity $f(x,u)$. Next, by using variational methods and the Moser iteration technique, we prove the existence of infinitely many solutions with $V(x)$ is a nonnegative potential and the nonlinearity $f(x,u)$ is locally sublinear with respect to $u$.

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