Steinke, Günter F.2015-10-182015-10-1819971172-8531http://hdl.handle.net/10092/11227This paper concerns a generalization of Moulton planes. We consider these semi-classical projective planes over half-ordered fields and completely determine their Lenz-Barlotti classes in the case of finite planes and of ordered planes. We also obtain a characterization of the Desarguesian planes among the semi-classical planes in terms of linear transitivity. These results are applied to (topological) 2-dimensional semi-classical projective planes.enCopyright Günter F. SteinkeFields of Research::49 - Mathematical sciences::4904 - Pure mathematics::490402 - Algebraic and differential geometry