We consider the Cauchy problem for the inhomogeneous nonlinear Schr\"{ o}dinger (INLS) equation \[iu_{ t} +\Delta u=|x|^{ -b} f(u),\;u(0)\in H^{ s} (\mathbb R^{ n} ),\] where $n\in \mathbb N$, $0<s<\min \{ n,\; 1+n/2\} $, $0<b<\min \{ 2,\;n-s,\;1+\frac{ n-2s}{ 2} \} $ and $f(u)$ is a nonlinear function that behaves like $\lambda \left|u\right|^{ \sigma } u$ with $\sigma>0$ and $\lambda \in \mathbb C$. Recently, An--Kim \cite{ AK21} proved the local existence of solutions in $H^{ s}(\mathbb R^{ n} )$ with $0\le s<\min \{ n,\; 1+n/2\}$. However even though the solution is constructed by a fixed point technique, continuous dependence in the standard sense in $H^{ s}(\mathbb R^{ n} )$ with $0< s<\min \{ n,\; 1+n/2\}$ doesn't follow from the contraction mapping argument. In this paper, we show that the solution depends continuously on the initial data in the standard sense in $H^{ s}(\mathbb R^{ n} )$, i.e. in the sense that the local solution flow is continuous $H^{ s}(\mathbb R^{ n} )\to H^{ s}(\mathbb R^{ n} )$, if $\sigma $ satisfies certain assumptions.
Categories: math.AP