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论文类型：期刊论文

发表时间：2012-12-01

发表刊物：INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS

收录刊物：Scopus、SCIE

卷号：9

期号：8

ISSN号：0219-8878

关键字：Lie symmetry; differential-difference equation; differential form method; Kac-Moody-Virasoro algebra

摘要：Based on the extended Harrison and Estabrook's differential form method, we obtain the Lie symmetries of two (2+1)-dimensional Toda-like lattices from two different sets of differential forms, respectively. Moreover it is shown that, for each lattice, the determining equations for the two sets give the same symmetries; and the set of differential forms for the lower-dimensional space can make the computation for finding symmetries simpler than the other.