KdV limit of the Euler-Poisson system

Details KdV limit of the Euler-Poisson system KdV limit of the Euler-Poisson system

2012-02-08

arxiv.org/abs/1202.1830v2

Mathematics

Analysis of PDEs

35 pages, Several typos are replaced

Scientific paper

Consider the scaling $\varepsilon^{1/2}(x-Vt)\to x,\ \varepsilon^{3/2}t\to t$
in the Euler-Poisson system for ion-acoustic waves \eqref{equ1}. We establish
that as $\varepsilon\to 0$, the solutions to such Euler-Poisson system converge
globally in time to the solutions of the Korteweg-de Vries equation.

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