On Weingarten surfaces
On Weyl pseudosymmetric hypersurfaces
On -homogeneous Riemannian manifolds. II.
On -curvature tensor of C3-like conformal Finsler space.
On -conformally flat contact metric manifolds.
On -recurrent generalized -contact metric manifolds.
On -recurrent Sasakian manifolds.
Onde di discontinuità gravitazionali in relatività generale
One more definition of the curvature and torsion of smooth curves
One parameter Lorentzian motions in Lorentz 3-space
One version of Miron's geometry in .
One-dimensional infinitesimal-birational duality through differential operators
The structure of filtered algebras of Grothendieck's differential operators on a smooth fat point in a curve and graded Poisson algebras of their principal symbols is explicitly determined. A related infinitesimal-birational duality realized by a Springer type resolution of singularities and the Fourier transformation is presented. This algebro-geometrical duality is quantized in appropriate sense and its quantum origin is explained.
One-sided Mullins-Sekerka flow does not preserve convexity.
Only one of generalized gradients can be elliptic
Decomposing the space of k-tensors on a manifold M into the components invariant and irreducible under the action of GL(n) (or O(n) when M carries a Riemannian structure) one can define generalized gradients as differential operators obtained from a linear connection ∇ on M by restriction and projection to such components. We study the ellipticity of gradients defined in this way.
Open book structures and unicity of minimal submanifolds
We prove unicity of certain minimal submanifolds, for example Clifford annuli in . The idea is to consider the placement of the submanifold with respect to the (singular) foliation of by the Clifford annuli whose boundary are two fixed great circles a distance apart.
Open books on contact five-manifolds
By using open book techniques we give an alternative proof of a theorem about the existence of contact structures on five-manifolds due to Geiges. The theorem asserts that simply-connected five-manifolds admit a contact structure in every homotopy class of almost contact structures.
Opérateur de Schrödinger pour un champ magnétique constant sur l'espace euclidien à deux dimensions
Opérateurs géométriques et géométrie conforme
Opérateurs transversalement elliptiques sur un feuilletage riemannien et applications
Operators in normed almost linear spaces