Discrete Symmetries for Spinor Field in de Sitter Space
  Discrete 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. 
S. Moradi, S. Rouhani and M.V. Takook