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Continuous Symmetries of the Lattice Potential KdV Equation

Decio Levi, Matteo Petrera

math-pharXiv:math-ph/0701079

Abstract

In this paper we present a set of results on the integration and on the symmetries of the lattice potential Korteweg-de Vries (lpKdV) equation. Using its associated spectral problem we construct the soliton solutions and the Lax technique enables us to provide infinite sequences of generalized symmetries. Finally, using a discrete symmetry of the lpKdV equation, we construct a large class of non-autonomous generalized symmetries.

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