Precisely Predictable Dirac Observables

This work presents a Clean Quantum Theory of the Electron, based on Dirac's equation. "Clean" in the sense of a complete mathematical explanation of the well known paradoxes of Dirac's theory and a connection to classical theory. It discusses the existence of an accurate split between physical states belonging to the electron and to the positron as well as the fact that precisely predictable observables must preserve this split.