Blow-up solutions for the Schrödinger equation in dimension three with a concentrated nonlinearity

Abstract
We present some results on the blow-up phenomenon for the Schrodinger equation in dimension three with a nonlinear term supported in a fixed point. We find sufficient conditions for the blow-up exploiting the moment of inertia of the solution and the uncertainty principle. In the critical case, we discuss the additional symmetries ,of the equation and construct a family of explicit blow-up solutions. (C) 2003 Elsevier SAS. All rights reserved.

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