%0 Journal Article
%T Continuous dependence for NLS in fractional order spaces
%A Thierry Cazenave
%A Daoyuan Fang
%A Zheng Han
%J Mathematics
%D 2010
%I arXiv
%R 10.1016/j.anihpc.2010.11.005
%X We consider the Cauchy problem for the nonlinear Schr\"odinger equation $iu_t+ \Delta u+ \lambda |u|^\alpha u=0$ in $\R^N $, in the $H^s$-subcritical and critical cases $0<\alpha \le 4/(N-2s)$, where $0<s<N/2$. Local existence of solutions in $H^s$ is well known. However, even though the solution is constructed by a fixed-point technique, continuous dependence in $H^s$ does not follow from the contraction mapping argument. In this paper, assuming furthermore $s<1$, we show that the solution depends continuously on the initial value in the sense that the local flow is continuous $H^s \to H^s$. If, in addition, $\alpha \ge 1$ then the flow is Lipschitz. This completes previously known results concerning the cases $s=0,1,2$.
%U http://arxiv.org/abs/1006.2745v2