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arXiv 1303.4145math.AP
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加权nonlinear elliptic方程的有限Morse指数解和渐近性

Finite Morse index solutions and asymptotics of weighted nonlinear elliptic equations

Yihong Du, Zongming Guo

摘要:

通过引入适当的设置,研究了方程\[ -\{div} (|x|^θ\nabla v)=|x|^l |v|^{p-1}v \;\;\; \{in $Ω\subset \R^N \; (N \geq 2)$}, \leqno(1) \]的有限Morse指数解的性质,其中$p>1$,$θ, l\in\R^1$与$N+θ>2$,$l-θ>-2$,$Ω$是有界或无界区域.通过适当的形式$v(x)=|x|^σu(x)$的变换,方程(1)可以被重写为具有Hardy势$$-Δu=|x|^α|u|^{p-1}u+\frac{\ell}{|x|^2} u \;\; \{in $Ω\subset \R^N \;\; (N \geq 2)$}, \leqno{(2)}$$的非线性薛定谔方程,其中$p>1$,$α\in (-\infty, \infty)$和$\ell \in (-\infty,(N-2)^2/4)$。我们证明了在我们所选择的有限Morse指标理论(1)的设置下,(1)的解的稳定性在各种自然变换下是不变的。这使我们能够揭示(1)中指数$p$的两个临界值,它们划分了(1)的有限Morse指数解的行为,这反过来又通过变换产生了(2)的两个临界幂。后者似乎很难通过直接与(2)一起工作来获得。

英文摘要:

By introducing a suitable setting, we study the behavior of finite Morse index solutions of the equation \[ -\{div} (|x|^θ\nabla v)=|x|^l |v|^{p-1}v \;\;\; \{in $Ω\subset \R^N \; (N \geq 2)$}, \leqno(1) \] where $p>1$, $θ, l\in\R^1$ with $N+θ>2$, $l-θ>-2$, and $Ω$ is a bounded or unbounded domain. Through a suitable transformation of the form $v(x)=|x|^σu(x)$, equation (1) can be rewritten as a nonlinear Schrödinger equation with Hardy potential $$-Δu=|x|^α|u|^{p-1}u+\frac{\ell}{|x|^2} u \;\; \{in $Ω\subset \R^N \;\; (N \geq 2)$}, \leqno{(2)}$$ where $p>1$, $α\in (-\infty, \infty)$ and $\ell \in (-\infty,(N-2)^2/4)$. We show that under our chosen setting for the finite Morse index theory of (1), the stability of a solution to (1) is unchanged under various natural transformations. This enables us to reveal two critical values of the exponent $p$ in (1) that divide the behavior of finite Morse index solutions of (1), which in turn yields two critical powers for (2) through the transformation. The latter appear difficult to obtain by working directly with (2).

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