... ftv≤ Ku − v, ∀u, v ∈ Ux, ∀t ∈ T. 2.203. Approximate Optimality ConditionsIn this section, several approximate optimality conditions will be established based onconcepts of -semiconvexity ... Loridan, “Necessary conditions for ε-optimality,” Mathematical Programming Study, no. 19, pp. 140–152, 1982.2 J J. Strodiot, V. H. Nguyen, and N. Heukemes, “ε -optimal solutions in nondifferentiable ... “Necessary optimality conditions and saddle points for approximate optimization in Banachspaces,” To p, vol. 13, no. 1, pp. 127–143, 2005.8 N. Dinh and T. Q . Son, “Approximate optimality...