Equation with the many fathers. The KleinGordon equation in 1926
Abstract
In this essay I discuss the origin and early development of the first relativistic wave equation, known as the KleinGordon equation. In 1926 several physicists, among them Klein, Fock, Schrödinger, and de Broglie, announced this equation as a candidate for a relativistic generalization of the usual Schrödinger equation. In most of the early versions the KleinGordon equation was connected with the general theory of relativity. Klein and some other physicists attempted to express quantum mechanics within a fivedimensional unified theory, embracing general relativity as well as electrodynamics. Although this ambitious attempt attracted some interest in 1926, its impact on the mainstream of development in quantum mechanics was virtually nil.
 Publication:

American Journal of Physics
 Pub Date:
 November 1984
 DOI:
 10.1119/1.13782
 Bibcode:
 1984AmJPh..52.1024K
 Keywords:

 01.65.+g;
 03.30.+p;
 03.65.Ca;
 History of science;
 Special relativity;
 Formalism