Slimani, Hachem; Radjef, Mohammed Said - In: European Journal of Operational Research 202 (2010) 1, pp. 32-41
In this paper, we are concerned with a nondifferentiable multiobjective programming problem with inequality constraints. We introduce new concepts of dI-invexity and generalized dI-invexity in which each component of the objective and constraint functions is directionally differentiable in its...