The heritage of S.Lie and F.Klein: Geometry via transformation groups
arXiv:math/0604223
Abstract
We outline a framework which generalizes Felix Klein's Erlanger Programm which he announced in 1872 after exchanging ideas with Sophus Lie.
arXiv comment20 pages. This is a revised form of the preprint "Some remarks on geometry (for free use)" posted in arXiv on April 2006