Zentrum Mathematik, Technische Universität München, Boltzmannstr. 3, 85747 Garching, Germany. email@example.com
We provide a detailed analysis of the minimizers of the functional , , subject to the constraint . This problem, e.g., describes the long-time behavior of the parabolic Anderson in probability theory or ground state solutions of a nonlinear Schrödinger equation. While existence can be proved with standard methods, we show that the usual uniqueness results obtained with PDE-methods can be considerably simplified by additional variational arguments. In addition, we investigate qualitative properties of the minimizers and also study their behavior near the critical exponent 2.
(Received February 22 2009)
(Revised July 27 2009)
(Online publication October 9 2009)
Mathematics Subject Classification: