Huygens’ principle for the generalized Dirac operator in curved spacetime

Abstract

In this article we give sufficient conditions for the generalized Dirac operator to obey the incomplete Huygens principle, as well as necessary and sufficient conditions to obey the Huygens principle by the Dirac operator in the curved spacetime of the Friedmann–Lemaître–Robertson–Walker (FLRW) models of cosmology.