Kalnins, Ernie G.Miller, W., Jr.2008-11-032008-11-031977-01Kalnins, E.G. & Miller, W., Jr. (1977). Lie theory and the wave equation in space–time. I. The Lorentz group. Journal of Mathematical Physics, 18, 1.0022-2488https://hdl.handle.net/10289/1237application/pdfenCopyright 1977 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in the Journal of Mathematical Physics and may be found at http://jmp.aip.org/jmp/top.jspMathematicsJournal Article10.1063/1.523130