Dirac developed a equation of motion for the wavefunction of the [[electron]] based on [[Theory of relativity|relativity]]. Dirac to predicted the existence of the [[positron]], the electron's [[antiparticle]], which was subsequently discovered by [[Carl Anderson]] in 1932. Dirac was the founder of [[quantum electrodynamics]].
Dirac published the "[[Principles of Quantum Mechanics]]" in 1930, which introduced the widely used [[delta]] [[function]] and [[
bracket notation]]. Inspired in part by this book, the physicist [[Richard Feynman]] later proposed a path integral formulation of quantum mechanics in 1948.