Kalnins, Ernie G.Miller, W., Jr.2008-11-032008-11-031978-06Kalnins, E.G. & Miller, W., Jr. (1978). Lie theory and the wave equation in space–time. 4. The Klein–Gordon equation and the Poincaré group. Journal of Mathematical Physics, 19, 1233.0022-2488https://hdl.handle.net/10289/1232application/pdfenCopyright 1978 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.jspMathematicsKlein–Gordon equationLie theory and the wave equation in space–time. 4. The Klein–Gordon equation and the Poincaré groupJournal Article10.1063/1.523819