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On global finite energy solutions of the Camassa-Holm equation. (English) Zbl 1175.35129

Summary: We consider the Camassa-Holm equation with data in the energy norm \(H^{1}(\mathbb R^{1})\). Global solutions are constructed by the small viscosity method for the frequency localized equations. The solutions are classical, unique and energy conservative. For finite band data, we show that global solutions for CH exist, satisfy the equation pointwise in time and satisfy the energy conservation law. We show that blow-up for higher Sobolev norms generally occurs in finite time and it might be of power type even for data in \(H^{3/2-}\).

MSC:

35Q53 KdV equations (Korteweg-de Vries equations)
35B25 Singular perturbations in context of PDEs
76B03 Existence, uniqueness, and regularity theory for incompressible inviscid fluids
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