Observation relative à l'article de M. Sourander.
Observations sur l'introduction d'une métrique dans le plan affin
Octahedral Noncompact Hyperbolic Space Forms With Finite Volume
Öffnungsinvarianten der Bahnregelflächen euklidischer Zwangläufe
On 2-quasi-umbilical pseudosymmetric hypersurfaces in the Euclidean space.
On a Carathéodory's conjecture on umbilics : representing ovaloids
On a class of graphs with perscribed mean curvature.
On a Computational Method for the Second Fundamental Tensor and its Application to Bifurcation Problems.
On a conjecture about the Gauss map of complete spacelike surfaces with constant mean curvature in the Lorentz-Minkowski space.
On a conjecture of G. Bol.
On a Conjectured Characterization of the Sphere.
On a free boundary problem for minimal surfaces.
On a Functional Equation of the Theory of Curves in Two Dimensional Conformal Geometry
On a generalized stereographic projection. (Zur verallgemeinerten stereographischen Projektion.)
On a global version of the Gauss-Bonnet theorem
On a negative flow of the AKNS hierarchy and its relation to a two-component Camassa-Holm equation.
On a new normalization for tractor covariant derivatives
A regular normal parabolic geometry of type on a manifold gives rise to sequences of invariant differential operators, known as the curved version of the BGG resolution. These sequences are constructed from the normal covariant derivative on the corresponding tractor bundle , where is the normal Cartan connection. The first operator in the sequence is overdetermined and it is well known that yields the prolongation of this operator in the homogeneous case . Our first main result...
On a problem of Chern-Akivis-Shelekhov on hexagonal three-webs.
On a problem of W. J. Firey in connection with the characterization of spheres.
On a result of Tzitzeica and a new asymptotic transformation of minimal projective surfaces