文摘
In this paper, we consider the initial value problem for the hyperbolic-type Davey–Stewartson equations, including elliptic–hyperbolic and hyperbolic–hyperbolic cases. We show the local existence and uniqueness of the solution in the generalized Feichtinger algebra \(\breve{M}_{1,1}^{s}(s\ge 3/2)\) with sufficiently small initial data in \(\breve{M}^{3/2}_{1,1}(\mathbb {R}^{2})\). Moreover, we show the ill-posedness of the solutions in the sense that the solution map is not \(C^3\) if the spatial regularity is below \(\breve{M}_{1,1}^{3/2}\). Keywords Davey–Stewartson equations Local well-posedness Feichtinger algebra