For various classes of vector optimization problems, necessary and sufficient optimality conditions are developed in terms of first order tangent cones and second order tangent sets and cones. Additional remarks are also made.

For various classes of vector optimization problems, necessary and sufficient optimality conditions are developed in terms of first order tangent cones and second order tangent sets and cones. Additional remarks are also made.

We give an overview of constraint qualifications and optimality conditions for a nonlinear pro- gramming problems where the functions involved have directional derivatives defined in an axiomatic way. We consider mainly the approach of Elster and Thierfelder (1985, 1988a, 1988b) and the approach...

For various classes of vector optimization problems, necessary and sufficient optimality conditions are developed in terms of first order tangent cones and second order tangent sets and cones. Additional remarks are also made.