A Note on the Guignard Constraint Qualification and the Guignard Regularity Condition in Vector Optimization

Some remarks are made on the use of the Abadie constraint qualification, the Guignard constraint qualifications and the Guignard regularity condition in obtaining weak and strong Kuhn-Tucker type optimality conditions in differentiable vector optimization problems.

A Simple Way to Prove the Characterization of Differentiable Quasiconvex Functions

We give a short and easy proof of the characterization of differentiable quasiconvex functions.