Une "preuve superbement simple" selon Terence Tao- Le problème de Kakeya discret

A Besicovitch set (which generalizes the Kakeya set) is a subset of R^n in which all directions are represented. Besicovitch proposed a finite field version of this type of set, and Zeev Dvir gave a lower bound for the cardinality of such a set. On the agenda: polynomials, finite fields, and combinatorics. But first and foremost, a superbly simple proof by the affable Fields Medalist Terence Tao.