In this article we prove that the semi-linear elliptic partial differential equation -Delta u + u = u(p) in Omega u > 0 in Omega. u = 0 on partial derivative Omega possesses a unique positive radially symmetric solution. Here p > 1 and Omega is the annulus (x epsilon R(N) vertical bar a < vertical bar x vertical bar < b), with N >= 2, 0 < a < b <= infinity. We also show the positive solution is non-degenerate. (C) 2008 Elsevier Inc. All rights reserved.
机构:
Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear ResearchBogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research