A possible mechanism for the origin of inertia in de Sitter-fantappi\'e-arcidiacono projective relativity

Fantappi\'e-Arcidiacono projective relativity, also known as "de Sitter relativity", provides a formulation of mechanics according to which it is possible to identify an inertial frame of reference by means of kinematic methods. This article presents the hypothesis that inertial frames of reference originated during the so-called "archaic era" of the Universe. A simple mechanism is proposed for this process. Such a process could leave behind cosmic fluid granulation, which could manifest itself in the present Universe as a clustering of dark matter in galaxies.