Abstract. An approach is proposed to the stability analysis with respect to perturbations of the input data of the vector integer optimization problem when using different (Pareto, Slater, and Smale) optimality principles. The properties of optimal and non-optimal problem solutions are investigated from the point of view of the stability of their membership in the sets of optimal and non-optimal solutions, respectively.

Keywords: discrete multicriteria optimization, vector criterion, quadratic functions, stability, perturbations of initial data.