Advances in Difference Equations, vol.2015, no.1, pp.1-15, 2015 (SCI-Expanded, Scopus)
In the present paper, a discrete optimization problem with rather general input data (without assumptions of convexity and smoothness) is considered. Taking into account the specific character of the discrete system, a necessary optimality condition which is not formulated in terms of the Hamilton-Pontryagin function is obtained.