Type: Article
Publication Date: 2011-10-05
Citations: 18
DOI: https://doi.org/10.2422/2036-2145.2011.3.02
We complete the known results on the Cauchy problem in Sobolev spaces for the KdV-Burgers equation by proving that this equation is well-posed in H -1 (R) with a solution-map that is analytic fromwhereas it is ill-posed in H s (R), as soon as s < -1, in the sense that the flowmap u 0 → u(t) cannot be continuous from H s (R) to even D (R) at any fixed t > 0 small enough.As far as we know, this is the first result of this type for a dispersive-dissipative equation.The framework we develop here should be useful to prove similar results for other dispersive-dissipative models.