Symmetries and integrability: Bakirov system revisited

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, , Citation A Sergyeyev 2001 J. Phys. A: Math. Gen. 34 4983 DOI 10.1088/0305-4470/34/23/313

0305-4470/34/23/4983

Abstract

All local generalized symmetries (including x,t-dependent ones) of the Bakirov system are found. In particular, it is shown that its only non-Lie-point local generalized symmetry is the sixth order one found by Bakirov. This result generalizes a similar result of Beukers, Sanders and Wang on x,t-independent symmetries and completes the refutation of the popular conjecture stating that the existence of one non-Lie-point local generalized symmetry for a (1+1)-dimensional system of PDEs implies the existence of infinitely many such symmetries.

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10.1088/0305-4470/34/23/313