作者: P. Winternitz , S. Tremblay , S. Lafortune
DOI: 10.1063/1.1398583
关键词:
摘要: A symmetry classification of possible interactions in a diatomic molecular chain is provided. For nonlinear the group Lie point transformations, leaving lattice invariant and taking solutions into solutions, at most five-dimensional. An example considered which subgroups are used to reduce dynamical differential-difference equations purely difference ones.