Tangents of conics in Hjelmslev planes over a local ring of even characteristic
Viliam Chvál, Rastislav Jurga (1998)
Mathematica Slovaca
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Displaying similar documents to “The cross-ratio in Hjelmslev planes”
Tangents of conics in Hjelmslev planes over a local ring of even characteristic
Desargues theorem for Klingenberg projective plane over certain local ring
Marek Jukl (1997)
Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica
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On special Riemannian -manifolds with distinct constant Ricci eigenvalues
Oldřich Kowalski, Zdeněk Vlášek (1999)
Mathematica Bohemica
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The first author and F. Prufer gave an explicit classification of all Riemannian 3-manifolds with distinct constant Ricci eigenvalues and satisfying additional geometrical conditions. The aim of the present paper is to get the same classification under weaker geometrical conditions.