Duality Theory and Lagrangian Multipliers in Vector Optimization

In the last years there has been a growing interest addessed to the study of Vector Optimization both from a theoretical point of view and as it concerns the applications to real problems. Such an interest asks for a general approach with embraces the several existing developments and stimulates new ones. This work, starting from a separation scheme, aims to contribute to set up such a general approach by taking into account recent results