Projektivni model dvodimenzionalne pseudoeuklidske geometrije
Proof of Atiyah's conjecture for two special types of configurations.
Proof of Oppenheim's area inequalities for triangles and quadrilaterals.
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...
Propriétés des quadrilatères complets qui ressortent de la considération de leurs bissectrices
Propriétés focales des figures homographiques
Quadratic forms over rings of dimension 1.
Quadratische Identitäten bei Polygonen.
Quasiconformal dimensions of self-similar fractals.
The Sierpinski gasket and other self-similar fractal subsets of Rd, d ≥ 2, can be mapped by quasiconformal self-maps of Rd onto sets of Hausdorff dimension arbitrarily close to one. In R2 we construct explicit mappings. In Rd, d ≥ 3, the results follow from general theorems on the equivalence of invariant sets for iterated function systems under quasisymmetric maps and global quasiconformal maps. More specifically, we present geometric conditions ensuring that (i) isomorphic systems have quasisymmetrically...
Quelques propriétés des parallèles et des anti-parallèles aux côtés d'un triangle
Quelques théorèmes de géométrie à dimensions
Quelques théorèmes sur les tétraèdres dont les arêtes opposées sont égales deux à deux, et solution de la question 1272
Range of the k-dimensional Radon transform in real hyperbolic spaces.
Räumliche Zindlerkurven.
Rayon de la sphère circonscrite au tétraèdre en fonction des arêtes
Realizations of regular apeirotopes.
Realizations of regular polytopes.
Recherche des graphes des matrices de Coxeter hyperboliques d’ordre
Recherches analytiques sur la surface du troisième ordre qui est la réciproque de la surface de Steiner
Recherches sur les normales que l'on peut, d'un point donné mener à une conique