Su uno spazio affine-metrico di dimensione quattro e a debole struttura di incidenza costruito su un campo di Galois

Abstract

In this work by means of the harmonic homologies,which commute with a polarity of a projective three space over a Galois field of odd order, a metric affine space of dimension four with a weak structure of incidence is constructed. Successively other hyperplanes are introduced, in order to obtain incidence structure of a affine space.