Properties of positive solutions of an Elliptic Equation with negative exponents

Details Properties of positive solutions of an Elliptic Equation with negative exponents Properties of positive solutions of an Elliptic Equation with negative exponents

2007-06-14

arxiv.org/abs/0706.2034v1

Mathematics

Analysis of PDEs

Scientific paper

In this paper, we study the existence and non-existence result of positive solutions to a singular elliptic equation with negative power on the bounded smooth domain or in the whole Euclidean space. Our model arises in the study of the steady states of thin films and other applied physics. We can get some useful local gradient estimate and L1 lower bound for positive solutions of the elliptic equation. A uniform positive lower bound for convex positive solutions is also obtained. We show that in lower dimensions, there is no stable positive solutions in the whole space. In the whole space of dimension two, we can show that there is no positive smooth solution with finite Morse index. Symmetry properties of related integral equations are also given.

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