Catégorie des points d'un espace projectif
Central Automorphisms of Veblenian Nearaffine Planes
The paper deals with nearaffine planes described by H. A. Wilbrink. We consider their central automorphisms, i.e. automorphisms satisfying the Veblen condition, which become central collineations in connected projective planes. Moreover, a concept of central pseudo-automorphism is considered, i.e. some bijections in a nearaffine plane are not automorphisms but they become central collineations in the related projective planes.
Ceva-Dreiecke.
Characterization of epimorphisms of nets by normal decompositions
Characterization of Grassmannians by one class of singular subspaces.
Classical polar spaces (sub-)weakly embedded in projective spaces.
Closure conditions in the nets
Coherent euclidean geometry
Collineation groups of translation planes of small dimension.
Compact 16-Dimensional Projective Planes with Large Collineation Groups.
Compact 16-dimensional Projective Planes with Large Collineation Groups. II.
Compact 8-dimensional Projective Planes.
Compact Disconnected Planes, Inverse Limits and Homomorphisms.
Configuration conditions of small point rank in 3-nets
Constructing non-regular algebraic spreads with asymplecticly complemented regulization.
Construction de plans par remplacement de secteurs.
Construction of countable ternary rings of suitable types [Abstract of thesis]
Construction of one epimorphism of projective planes over Cartesian groups
Constructive Coordinatization of Desarguesian Planes.
Convex lines in median groups
There is proved that a convex maximal line in a median group , containing 0, is a direct factor of .