Infinitely many symmetries and conservation laws for quad-graph equations via the Gardner method

Details Infinitely many symmetries and conservation laws for quad-graph equations via the Gardner method Infinitely many symmetries and conservation laws for quad-graph equations via the Gardner method

2010-01-05

arxiv.org/abs/1001.0724v1

Nonlinear Sciences

Exactly Solvable and Integrable Systems

Scientific paper

The application of the Gardner method for generation of conservation laws to all the ABS equations is considered. It is shown that all the necessary information for the application of the Gardner method, namely B\"acklund transformations and initial conservation laws, follow from the multidimensional consistency of ABS equations. We also apply the Gardner method to an asymmetric equation which is not included in the ABS classification. An analog of the Gardner method for generation of symmetries is developed and applied to discrete KdV. It can also be applied to all the other ABS equations.

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