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arXiv 1010.2289math.AP
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带域上半线性椭圆型方程的最小能量解

On least Energy Solutions to A Semilinear Elliptic Equation in A Strip

Henri Berestycki, Juncheng Wei

摘要:

考虑带上的半线性椭圆型方程:\[ \left\{{array}{l} Δu-u + u^p=0 \ {in} \ \R^{N-1} \times (0, L), u>0, \frac{\partial u}{\partial ν}=0 \ {on} \ \partial (\R^{N-1} \times (0, L)) {array} \right.\]其中$ 1< p\leq \frac{N+2}{N-2}$ .当$ 1<p <\frac{N+2}{N-2}$,它表明,存在一个唯一的$L_{*} >0$,使得对于$L \leq L_{*}$,最小能量的解决方案是平凡的,即,不依赖于$x_N$,并且对于$L >L_{*}$,最小能量解是非平凡的。当$N \geq 4, p=\frac{N+2}{N-2}$时,证明了存在两个数$L_{*}<L_{**}$,使得当$L \leq L_{*}$时最小能量解是平凡的,当$L \in (L_{*}, L_{**}]$时最小能量解是非平凡的,当$L >L_{**}$时最小能量解不存在.还与CMC理论中的Delaunay曲面建立了联系。

英文摘要:

We consider the following semilinear elliptic equation on a strip: \[ \left\{{array}{l} Δu-u + u^p=0 \ {in} \ \R^{N-1} \times (0, L), u>0, \frac{\partial u}{\partial ν}=0 \ {on} \ \partial (\R^{N-1} \times (0, L)) {array} \right.\] where $ 1< p\leq \frac{N+2}{N-2}$. When $ 1<p <\frac{N+2}{N-2}$, it is shown that there exists a unique $L_{*} >0$ such that for $L \leq L_{*}$, the least energy solution is trivial, i.e., doesn't depend on $x_N$, and for $L >L_{*}$, the least energy solution is nontrivial. When $N \geq 4, p=\frac{N+2}{N-2}$, it is shown that there are two numbers $L_{*}<L_{**}$ such that the least energy solution is trivial when $L \leq L_{*}$, the least energy solution is nontrivial when $L \in (L_{*}, L_{**}]$, and the least energy solution does not exist when $L >L_{**}$. A connection with Delaunay surfaces in CMC theory is also made.

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