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Jul 9, 2011 at 13:41 comment added agt Dear Michael, I stated that historical attribution not for having read the original papers of Lie on transformation groups written in the seventies of ninenteenth century, but I learned it from Ch.5 §2.2 "The Geometry of Differential Equations" in "Geometry I, EMS 28" of Alekseevskij, Vinogradov, Lychagin.
Jul 9, 2011 at 9:29 history answered Michael Bächtold CC BY-SA 3.0