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Algebraic Structure of Discrete Zero Curvature Equations and Master Symmetries of Discrete Evolution Equations

An algebraic structure related to discrete zero curvature equations is established. It is used to give an approach for generating master symmetries of first degree for systems of discrete evolution equations and an answer to why there exist such master symmetries. The key of the theory is to generate nonisospectral flows $(λ_t=λ^l, l\ge0)$ from the discrete spectral problem associated with a given system of discrete evolution equations. Three examples are given.

preprint1999arXivOpen access
Wen-Xiu MaBenno Fuchssteiner
solv-intnlin.SI
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Wen-Xiu MaBenno Fuchssteiner

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