Hoyle, F.Narlikar, J. V.2012-03-092012-03-091972-07-14http://hdl.handle.net/11007/1053The fact that the muon and the electron have different masses can be understood in terms of a machian theory of inertia. The masses of particles are not fixed and immutable but depend on the detailed particle composition of the universe.enMassMuon and the electronArticle