H. Kuk et al., Optimality and duality for nonsmooth multiobjective fractional programmingwith generalized invexity, J MATH ANAL, 262(1), 2001, pp. 365-375
In this paper, we consider a class of nonsmooth multiobjective fractional p
rogramming problems in which functions are locally Lipschitz. We establish
generalized Karush-Kuhn-Tucker necessary and sufficient optimality conditio
ns and derive duality theorems for nonsmooth multiobjective fractional prog
ramming problems containing V-rho -invex functions. (C) 2001 Academic Press
.