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arXiv 1001.4489math.AP
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具有幂增长非线性项的完全非线性方程的Sharp Liouville结果

Sharp Liouville results for fully nonlinear equations with power-growth nonlinearities

Scott N. Armstrong, Boyan Sirakov

摘要:

我们研究完全非线性椭圆方程,如\[ F(D^2u) = u^p, \quad p>1, \]在$\R^n$或在外部区域,其中$F$是任何一致椭圆,正齐次算子。我们发现,存在一个临界指数,依赖于$F$的基本解的齐性,这急剧的特点范围的$p>1$,存在正的上解或解决方案,在任何外部域。我们的结果推广了Bidaut-Véron \cite{B}以及Cutri和Leoni \cite{CL}的定理,他们分别在$-F$是Laplace算子和Pucci算子的情况下,找到了整个空间$\R^n$上解的临界指数.我们提出的论点是新的,只依赖于方程的标度性质和最大值原理。

英文摘要:

We study fully nonlinear elliptic equations such as \[ F(D^2u) = u^p, \quad p>1, \] in $\R^n$ or in exterior domains, where $F$ is any uniformly elliptic, positively homogeneous operator. We show that there exists a critical exponent, depending on the homogeneity of the fundamental solution of $F$, that sharply characterizes the range of $p>1$ for which there exist positive supersolutions or solutions in any exterior domain. Our result generalizes theorems of Bidaut-Véron \cite{B} as well as Cutri and Leoni \cite{CL}, who found critical exponents for supersolutions in the whole space $\R^n$, in case $-F$ is Laplace's operator and Pucci's operator, respectively. The arguments we present are new and rely only on the scaling properties of the equation and the maximum principle.

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