INVEXITY AS NECESSARY OPTIMALITY CONDITION IN NONSMOOTH PROGRAMS
Pham-Huu Sach, Do-Sang Kim, Gue-Myung Lee · Journal of the Korean Mathematical Society · 2006
This paper gives conditions under which necessary optimality conditions in a locally Lipschitz program can be expressed as the invexity of the active constraint functions or the type I invexity of the objective function and the constraint functions on the feasible set of the program. The results are nonsmooth extensions of those of Hanson and Mond obtained earlier in differentiable case.