A-priori bounds for KdV equation below H−3/4H^{-3/4}

preprint2011arXivOpen access

Abstract

We consider the Korteweg-de Vries Equation (KdV) on the real line, and prove that the smooth solutions satisfy a-priori local in time HsH^s bound in terms of the HsH^s size of the initial data for s≥−4/5s\geq -4/5.

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