Physics – Mathematical Physics
Scientific paper
2010-04-29
Physics
Mathematical Physics
17 pages, 1 figure
Scientific paper
We present an algorithm for determining the Lie point symmetries of differential equations on fixed non transforming lattices, i.e. equations involving both continuous and discrete independent variables. The symmetries of a specific integrable discretization of the Krichever-Novikov equation, the Toda lattice and Toda field theory are presented as examples of the general method.
Levi Decio
Winternitz Pavel
Yamilov Ravil
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