On the rectifiability condition of a second order ordinary differential equation.
On the rectilinear extremals of geodesics in geometry.
On the reducibility of connections on the prolongations of vector bundles
On the reduction formulas
On the reduction theorems
On the reflections in bounded symmetric domains
On the Regularity of Alexandrov Surfaces with Curvature Bounded Below
In this note, we prove that on a surface with Alexandrov’s curvature bounded below, the distance derives from a Riemannian metric whose components, for any p ∈ [1, 2), locally belong to W1,p out of a discrete singular set. This result is based on Reshetnyak’s work on the more general class of surfaces with bounded integral curvature.
On the Regularity of Minimal Surfaces with Free Boundaries in Riemannian Manifolds.
On The Relation Between Connection And Sprays.
On the relation between the Einstein and the Komar expressions for the energy of the gravitational field
On the Resolution of Degenerate Closed Geodescis.
On the rheonomic Finslerian mechanical systems.
On the Ricci curvature of homogeneous metrics on noncompact homogeneous spaces.
On the Ricci operator of locally homogeneous Lorentzian 3-manifolds
We determine the admissible forms for the Ricci operator of three-dimensional locally homogeneous Lorentzian manifolds.
On the Ricci Tensor of a real hypersurface of quaternionic hyperbolic space.
On the Ricci tensor of real hypersurfaces of quaternionic projective space.
On the Riemannian curvature tensor of an almost-product manifold
On the Riemann-Lie algebras and Riemann-Poisson Lie groups.
On the Rigidity of Certain Discrete Groups and Algebraic Varieties.
On the rigidity of certain surfaces in