Abstract
In this paper, we give a construction of u0∈Bp,∞σ such that the corresponding solution to the Camassa-Holm equation starting from u0 is discontinuous at t=0 in the metric of Bp,∞σ, which implies the ill-posedness for this equation in Bp,∞σ. We also apply our method to the b-equation and Novikov equation.
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