Geometry and Differential Geometry

Inhaltsverzeichnis

• On free Minkowski planes.
• Rigidity in the geometry of involutory elements of a group.
• Ein Trennungsaxiom in der Orthogonalgeometrie und eine Charakterisierung der reellen Ebene.
• Applications of the theory of surfaces to the theory of graphs.
• Central translation S-space.
• Systems of quadrics through a general variety of Segre and their reduction to irreducible parts [2].
• Generators and relations for classical groups.
• Some combinational problems in geometry.
• Über die algorithmische Lösung des Steinitzproblems einer inneren Kennzeichnung polytopaler Sphären.
• Regular permutation geometries.
• On characterisations of kinematic spaces by parallelisms.
• On realizations of vector products by polynomials which are identities for matrix rings.
• On the construction of archimedean orders of a free plane.
• Rectangular spaces.
• On sharply 2-transitive permutation sets.
• Dimension of nearaffine spaces.
• Generating cryptomorphic axiomatizations of matroids.
• Partial planes with exactly two complete parallel classes.
• A problem of free mobility.
• A unified approach to Miquel's theorem and its degenerations.
• Automorphisms of laguerre-geometry and cone-preserving mappings of metric vector spaces.
• Bounds for the number of solutions of certain piecewise linear equations.
• Zur Translationstransitivität in affinen Hjelmslevebenen.
• Near-rings with right inverse property.
• On reflections in Minkowski-planes.
• On the space of Riemannian metrics on surfaces and contact manifolds.
• Circles on surfaces in the euclidean 3-space.
• Classes caracteristiques principales et secondaires.
• Deformation theory and stability for holomorphic foliations.
• Vanishing theorems and stability of complex analytic foliations.
• Power series expansions, differential geometry of geodesic spheres and tubes, and mean-value theorems.
• On distance-decreasing collineations.
• On a parametrix form in a certain V-submersion.
• Stable and unstable motions on surfaces.
• Vector fields and generalized vector fields on fibered manifolds.
• Lie algebras of order 0 on a manifold.
• à l'étude de certains systèmes différentiels.
• Infinitesimal deformations preserving parallel normal vector fields.
• Differential Galois theory.
• Counterexamples to a conjecture of Rene Thom.
• Conformal invariants on almost Hermitian manifolds.
• Conformal changes of almost contact metric structures.