Nonlinear Schroedinger equations with radially symmetric data of critical regularity

Details Nonlinear Schroedinger equations with radially symmetric data of critical regularity Nonlinear Schroedinger equations with radially symmetric data of critical regularity

2007-11-13

arxiv.org/abs/0711.1941v1

Mathematics

Analysis of PDEs

15 pages. To appear in Funkcialaj Ekvacioj. Journal, http://www.math.kobe-u.ac.jp/~fe

Scientific paper

This paper is concerned with the global existence of small solutions to pure-power nonlinear Schroedinger equations subject to radially symmetric data with critical regularity. Under radial symmetry we focus our attention on the case where the power of nonlinearity is somewhat smaller than the pseudoconformal power and the initial data belong to the scale-invariant homogeneous Sobolev space. In spite of the negative-order differentiability of initial data the nonlinear Schroedinger equation has global in time solutions provided that the initial data have the small norm. The key ingredient in the proof of this result is an effective use of global weighted smoothing estimates specific to radially symmetric solutions.

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