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Non-Existence Results for Semilinear Cooperative Elliptic Systems via Moving Spheres

2000; Elsevier BV; Volume: 161; Issue: 1 Linguagem: Inglês

10.1006/jdeq.1999.3700

1090-2732

Wolfgang Reichel, Henghui Zou,

Nonlinear Differential Equations Analysis

Based upon a new development of the method of moving spheres, we introduce a new and general approach for non-existence of positive solutions of cooperative semilinear elliptic systems with the Laplacian as principal part. For supercritical nonlinearities we prove non-existence on bounded star-shaped domains. For subcritical nonlinearities we obtain non-existence results on a class of unbounded domains, which includes e.g. the entire space, certain curved halfspaces and the complement of bounded star-shaped domains. As a by-product we also get a symmetry result on halfspaces.