A new method for the computation of conserved densities of nonlinear
differential-difference equations is applied to Toda lattices and
discretizations of the Korteweg-de Vries and nonlinear Schrodinger equations.
The algorithm, which can be implemented in computer algebra languages such as
Mathematica, can be used as an indicator of integrability.Comment: submitted to Phys. Lett A, 10 pages, late