The Strictly Efficient Subgradient of Set-Valued Optimisation
Taiyong Li, Yihong Xu · Bulletin of the Australian Mathematical Society · 2007
The subgradient, under strict efficiency, of a set-valued mapping is developed, and the existence of the subgradient is proved. Optimality conditions in terms of Lagrange multipliers for a strictly efficient point are established in the general case and in the case with ic-cone-convexlike data.