Khanh, Phan Quoc; Quyen, Ho Thuc; Yao, Jen-Chih - In: European Journal of Operational Research 212 (2011) 2, pp. 235-241
A set-constrained optimization problem and a mathematical programming problem are considered. We assume that the sublevel sets of the involving functions are convex only at the point under question and hence these functions are not assumed quasiconvex. Using the two star subdifferentials and the...