Moreno, Samuel G.; Almira, Jose María; García-Caballero, Esther M.; Quesada, J.M.(Universitat Politècnica de València, 2004-04-01)
[EN] The main goal of this paper is to put some light in several arguments that have been used through the time in many contexts of Best Approximation Theory to produce proximinality results. In all these works, the main ...