06.09.2004 14:33
Hm, that is nonsense. Since relativistically the invariant mass
m^2 = E^2 - p^2
is a lorentz scalar, so the energy E itself isn't invariant. Or take it this way: E is a component of a four vector. So both operators HD and h depend on the reference frame. So the only invariant thing about Dirac theory is the Dirac equation?
