Method for searching higher symmetries for quad graph equations

Details Method for searching higher symmetries for quad graph equations Method for searching higher symmetries for quad graph equations

2011-04-04

arxiv.org/abs/1104.0493v1

Nonlinear Sciences

Exactly Solvable and Integrable Systems

16 pages, submitted to JPA

Scientific paper

Generalized symmetry integrability test for discrete equations on the square
lattice is studied. Integrability conditions are discussed. A method for
searching higher symmetries (including non-autonomous ones) for quad graph
equations is suggested based on characteristic vector fields.

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