2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/56402Recent progress in mathematical theory of random processes provides us with non-Fock product systems (continuous tensor products of Hilbert spaces) used here for constructing a toy model for fermions. Some state vectors describe infinitely many particles in a finite region; the particles accumulate to a point. Electric charge can be assigned to the particles, the total charge being zero. Time dynamics is not considered yet, only kinematics (a single time instant).15 pages, 2 figures, LaTeX2eHigh Energy Physics - TheoryProbabilitytext