In this book we are attempting to offer a modification of Dirac’s theory of the
electron we believe to be free of the usual paradoxa, so as perhaps to be acceptable
as a clean quantum-mechanical treatment.
While it seems to be a fact that the classical mechanics, from Newton to Einstein’s
theory of gravitation, offers a very rigorous concept, free of contradictions
and able to accurately predict motion of a mass point, quantum mechanics, even
in its simplest cases, does not seem to have this kind of clarity. Almost it seems
that everyone of its fathers had his own wave equation.