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arXiv 1104.5338math.AP
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完全nonlinear elliptic方程的奇异解及其应用

Singular solutions of fully nonlinear elliptic equations and applications

Scott N. Armstrong, Boyan Sirakov, Charles K. Smart

摘要:

研究了完全非线性正齐次椭圆型方程在Lipschitz区域的边界点附近的解的性质,在该点处解可能是奇异的.我们证明了这些方程在$\mathbb{R}^n$的每个锥上都有两个正解,并且在适当的意义下解是唯一的.我们介绍了一种新的方法来分析某些Lipschitz边界点附近的解决方案的行为,这使我们能够分类孤立的边界奇点的解决方案,从上面或下面有界。在某些Lipschitz域上,我们还得到了一个尖锐的Phragmén-Lindelöf结果和一个正奇点原理.

英文摘要:

We study the properties of solutions of fully nonlinear, positively homogeneous elliptic equations near boundary points of Lipschitz domains at which the solution may be singular. We show that these equations have two positive solutions in each cone of $\mathbb{R}^n$, and the solutions are unique in an appropriate sense. We introduce a new method for analyzing the behavior of solutions near certain Lipschitz boundary points, which permits us to classify isolated boundary singularities of solutions which are bounded from either above or below. We also obtain a sharp Phragmén-Lindelöf result as well as a principle of positive singularities in certain Lipschitz domains.

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