Abstract
In this short communication, we consider a discrete example of how to perform multiple scale expansions and by starting from the discrete nonlinear Schroodinger equation (DNLS) as well as the Ablowitz-Ladik nonlinear Schrodinger equation (AL-NLS), we obtain the corresponding discrete versions of a Korteweg-de Vries (KdV) equation. We analyze in particular the equation obtained from the AL-NLS and discuss its integrability, as well as its connections with previously studied discrete versions of the KdV equation.
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