2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/170981We study a finite analog of a problem of Erdos, Hickerson and Pach on the maximum number of occurrences of a fixed angle among n directions in three-dimensional spaces.CombinatoricsThe number of occurrences of a fixed spread among n directions in vector spaces over finite fieldstext