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Paper detail

Singularity analysis of a new discrete nonlinear Schrodinger equation

We apply the Painleve test for integrability to a new discrete (differential-difference) nonlinear Schrodinger equation introduced by Leon and Manna. Since the singular expansions of solutions of this equation turn out to contain nondominant logarithmic terms, we conclude that the studied equation is nonintegrable. This result supports the observation of Levi and Yamilov that the Leon-Manna equation does not admit high-order generalized symmetries. As a byproduct of the singularity analysis carried out, we obtain a new discrete equation which should be integrable according to a conjecture of Weiss.

preprint2013arXivOpen access
Sergei Sakovich
math-phmath.MPmath.CAnlin.SI
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Sergei Sakovich

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