Optimality and duality in nonlinear programming involving semilocally preinvex and related functions
Vasile Preda, Ion M. Stancu-Minasian, Anton Bătătorescu · Journal of Information and Optimization Sciences · 1996
For a nondifferentiable nonlinear programming problem, Fritz John and Kuhn-Tucker necessary optimality conditions and sufficient optimality conditions are given and duality results are stated for Wolfe’s type and Mond-Weir type duals by the concepts of semilocally quasi-preinvex and semilocally pseudo-preinvex functions.