In this paper we analyzed the evolution of the sales concept.This concept has evolved over the last fifty years, Glass Cleaners and has undergone radical changes in recent decades.If before sales include selling space, where was a seller, merchandise and a buyer, today consumer can buy through internet and in this way he can buy faster and is no lo

The resources available for managing disease epidemics - whether in animals, plants or humans - are limited by a range of practical and financial constraints.Optimal control has been widely explored for optimising allocation of these resources to maximise their impact.The most common approach assumes a deterministic, continuous model to approximate