%0 Journal Article
%A Fernández-Rañada, Antonio
%T Causality of a wave-equation and invariance of its hyperbolicity conditions
%D 1980
%@ 0556-2821
%U https://hdl.handle.net/20.500.14352/64904
%X A characterization of the noncausal behavior of a covariant wave equation is given in terms of the invariance of the hyperbolicity conditions. Some examples in which the Dirac field is not causal are studied.
%~