2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/219108We present a cosmological model in which a single Dirac field with a flat potential can give rise to inflation within the framework of the Einstein-Cartan theory. It is shown that our Dirac-field model leads to a nearly scale-invariant spectrum of density fluctuations owing to the spin-interaction which naturally arises from the field equations of the Einstein-Cartan theory.9 pages, 1 figureCosmology and Nongalactic Astrophysicstext