Affine and finite Lie algebras and integrable Toda field equations on discrete space-time

Details Affine and finite Lie algebras and integrable Toda field equations on discrete space-time Affine and finite Lie algebras and integrable Toda field equations on discrete space-time

2011-09-08

arxiv.org/abs/1109.1689v3

Nonlinear Sciences

Exactly Solvable and Integrable Systems

41 pages, submitted to SIGMA, special issue, proceedings of "International Conference Geometrical Methods in Mathematical Phys

Scientific paper

Difference-difference systems are suggested corresponding to the Cartan matrices of any simple or affine Lie algebra. In the cases of the algebras $A_N$, $B_N$, $C_N$, $G_2$, $D_3$, $A_1^{(1)}$, $A_2^{(2)}$, $D^{(2)}_N$ these systems are proved to be integrable. For the systems corresponding to the algebras $A_2$, $A_1^{(1)}$, $A_2^{(2)}$ generalized symmetries are found. For the systems $A_N$, $B_N$, $C_N$, $G_2$, $D_3$ complete sets of integrals are found. The Lax representation for the difference-difference systems corresponding to $A_N$, $B_N$, $C_N$, $A^{(1)}_1$, $D^{(2)}_N$ are presented.

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