Nonlinear Sciences – Exactly Solvable and Integrable Systems
Scientific paper
1998-12-16
J. Math. Phys. 40 (1999) 2782-2804
Nonlinear Sciences
Exactly Solvable and Integrable Systems
40 pages, no figures, typed in AMS-LaTeX
Scientific paper
10.1063/1.532728
The Lie point symmetries of a coupled system of two nonlinear
differential-difference equations are investigated. It is shown that in special
cases the symmetry group can be infinite dimensional, in other cases up to 10
dimensional. The equations can describe the interaction of two long molecular
chains, each involving one type of atoms.
Gomez-Ullate David
Lafortune Stephane
Winternitz Pavel
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