Geometry and Differential Geometry

On free Minkowski planes....Pages 1-7
Rigidity in the geometry of involutory elements of a group....Pages 8-13
Ein Trennungsaxiom in der Orthogonalgeometrie und eine Charakterisierung der reellen Ebene....Pages 14-19
Applications of the theory of surfaces to the theory of graphs....Pages 20-23
Central translation S-space....Pages 24-29
Systems of quadrics through a general variety of Segre and their reduction to irreducible parts [2]....Pages 30-39
Generators and relations for classical groups....Pages 40-45
Some combinational problems in geometry....Pages 46-53
Über die algorithmische Lösung des Steinitzproblems einer inneren Kennzeichnung polytopaler Sphären....Pages 54-58
Regular permutation geometries....Pages 59-60
On characterisations of kinematic spaces by parallelisms....Pages 61-67
On realizations of vector products by polynomials which are identities for matrix rings....Pages 68-72
On the construction of archimedean orders of a free plane....Pages 73-78
Rectangular spaces....Pages 79-91
On sharply 2-transitive permutation sets....Pages 92-96
Dimension of nearaffine spaces....Pages 97-109
Generating cryptomorphic axiomatizations of matroids....Pages 110-113
Partial planes with exactly two complete parallel classes....Pages 114-127
A problem of free mobility....Pages 128-131
A unified approach to Miquel\'s theorem and its degenerations....Pages 132-142
Automorphisms of laguerre-geometry and cone-preserving mappings of metric vector spaces....Pages 143-147
Bounds for the number of solutions of certain piecewise linear equations....Pages 148-166
Zur Translationstransitivität in affinen Hjelmslevebenen....Pages 167-173
Near-rings with right inverse property....Pages 174-182
On reflections in Minkowski-planes....Pages 183-202
On the space of Riemannian metrics on surfaces and contact manifolds....Pages 203-212
Circles on surfaces in the euclidean 3-space....Pages 213-221
Classes caracteristiques principales et secondaires....Pages 222-234
Deformation theory and stability for holomorphic foliations....Pages 235-246
Vanishing theorems and stability of complex analytic foliations....Pages 247-251
Power series expansions, differential geometry of geodesic spheres and tubes, and mean-value theorems....Pages 252-259
On distance-decreasing collineations....Pages 260-263
On a parametrix form in a certain V-submersion....Pages 264-298
Stable and unstable motions on surfaces....Pages 299-306
Vector fields and generalized vector fields on fibered manifolds....Pages 307-355
Lie algebras of order 0 on a manifold....Pages 356-362
Introduction à l\'étude de certains systèmes différentiels....Pages 363-382
Infinitesimal deformations preserving parallel normal vector fields....Pages 383-405
Differential Galois theory....Pages 406-413
Counterexamples to a conjecture of Rene Thom....Pages 414-421
Conformal invariants on almost Hermitian manifolds....Pages 422-434
Conformal changes of almost contact metric structures....Pages 435-443