KdV Preserves White Noise

Details KdV Preserves White Noise KdV Preserves White Noise

2006-11-06

arxiv.org/abs/math/0611152v1

Mathematics

Analysis of PDEs

6 pages

Scientific paper

It is shown that white noise is an invariant measure for the Korteweg-deVries equation on $\mathbb T$. This is a consequence of recent results of Kappeler and Topalov establishing the well-posedness of the equation on appropriate negative Sobolev spaces, together with a result of Cambronero and McKean that white noise is the image under the Miura transform (Ricatti map) of the (weighted) Gibbs measure for the modified KdV equation, proven to be invariant for that equation by Bourgain.

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