M. Klimek, THE CONSERVATION-LAWS AND INTEGRALS OF MOTION FOR A CERTAIN CLASS OF EQUATIONS IN DISCRETE MODELS, Journal of physics. A, mathematical and general, 29(8), 1996, pp. 1747-1758
We derive the conservation laws for a wide class of discrete equations
, including the q-deformations of classical field-theoretic equations.
The explicit expressions for the conserved currents are used in the c
onstruction of the integrals of motion. The procedure is applied to th
e nonlinear difference equation and to the q-wave equations in D = 3 a
nd D = 4.