REFERENCES
- M.A. Hanson ( 1981 ). On sufficiency of the Kuhn-Tucker conditions , J. Math. Anal. Appl . 80 : 545 – 550 .
- V. Jeyakumar ( 1985 ). Strong and weak invexity in mathematical programming . Methods Oper. Res. 55 : 109 – 125 .
- B. Mond and T. Weir ( 1981 ). Generalized concavity and duality . In Generalized Concavity in Optimization and Economics ( S. Schaible and W.T. Ziemba , eds) Academic Press , New York , pp. 263 – 279 .
- G.J. Zalmai and Q. Zhang ( 2006 ). Global nonparametric sufficient optimality conditions for semi-infinite minmax fractional programming problems involving generalized (η, ρ)-invex functions . Numer. Funct. Anal. Optimiz . ( in press ).