2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/196929Discrete symmetries, parity, time reversal, antipodal, and charge conjugation transformations for spinor field in de Sitter space, are presented in the ambient space notation, i.e. in a coordinate independent way. The PT and PCT transformations are also discussed in this notation. The five-current density is studied and their transformation under the discrete symmetries is discussed.13 pages, LaTeX; appendices addedGeneral Relativity and Quantum Cosmologytext