Feynman's derivation of Maxwell equations and extra dimensions

Abstract

It is shown that Feynman's derivation of Maxwell equations admits a generalization to the case of extra spatial dimensions. The generalization is unique and is only possible in seven dimensional space.

Comments: 15 pages, LaTeX. New reference is added. To be published in the special issue "Contemporary Electrodynamics" of the Journal "Annales de Fondation Louis de Broglie"