Projective planes of order 10 do not have a collineation of order 3.
Projective planes of order 12 do not have a non-abelian group of order 6 as a collineation group.
Projectivities over Local Rings.
Projektion des Schnitts zweier Quadriken
Projektion des Torus in isotroper Richtung.
Projektive Abbildung von Moduln
Projektive Abbildungen projektiver Räume mit Homomorphismus
Projektive Ebenen, die Mannigfaltigkeiten sind.
Projektive Ebenen mit Homomorphismus und erweiterte lokale Ternärringe
Projektive Eingenschaften des abgestumpften Würfels.
Projektive Hjelmslevsche Räume im nicht invarianten Fall.
Projektivni model dvodimenzionalne pseudoeuklidske geometrije
Projektivní prostor -rozměrný
Proof of Atiyah's conjecture for two special types of configurations.
Proof of Oppenheim's area inequalities for triangles and quadrilaterals.
Proper holomorphic mappings and real reflection groups.
Properties of triangulations obtained by the longest-edge bisection
The Longest-Edge (LE) bisection of a triangle is obtained by joining the midpoint of its longest edge with the opposite vertex. Here two properties of the longest-edge bisection scheme for triangles are proved. For any triangle, the number of distinct triangles (up to similarity) generated by longest-edge bisection is finite. In addition, if LE-bisection is iteratively applied to an initial triangle, then minimum angle of the resulting triangles is greater or equal than a half of the minimum angle...
Property (T) and groups
We show that each group in a class of finitely generated groups introduced in [2] and [3] has Kazhdan’s property (T), and calculate the exact Kazhdan constant of with respect to its natural set of generators. These are the first infinite groups shown to have property (T) without making essential use of the theory of representations of linear groups, and the first infinite groups with property (T) for which the exact Kazhdan constant has been calculated. These groups therefore provide answers...
Propriétés des quadrilatères complets qui ressortent de la considération de leurs bissectrices
Propriétés des systèmes de coniques, dans lesquels se trouvent des conditions de perpendicularité entre diverses séries de droites