O geometrii laplasiánu. I
O geometrii laplasiánu. II
On 3-dimensional CR-manifolds
On a Bianchi-type identity for the almost hermitian manifolds
Almost hermitian manifolds, whose Riemann curvature tensor satisfies an almost complex Bianchi-type identity, are considered. Some local and global theorems are proved. The special cases of parakähler manifolds and of Kähler manifolds are examined.
On a Certain Class of Complex Einstein Hypersurfaces in Indefinite Complex Space Forms.
On a Certain Extension of the Class of Semisymmetric Manifolds
On a class of even-dimensional manifolds structured by an affine connection.
On a Class of Generalized quasi-Einstein Manifolds with Applications to Relativity
Quasi Einstein manifold is a simple and natural generalization of Einstein manifold. The object of the present paper is to study some properties of generalized quasi Einstein manifolds. We also discuss with space-matter tensor and some properties related to it. Two non-trivial examples have been constructed to prove the existence of generalized quasi Einstein spacetimes.
On a class of Ricci-recurrent manifolds.
On a classification of almost geodesic mappings of affine connection spaces
On a conjecture about the Gauss map of complete spacelike surfaces with constant mean curvature in the Lorentz-Minkowski space.
On a generalized class of recurrent manifolds
The object of the present paper is to introduce a non-flat Riemannian manifold called hyper-generalized recurrent manifolds and study its various geometric properties along with the existence of a proper example.
On a linear family of affine connections.
On a negative flow of the AKNS hierarchy and its relation to a two-component Camassa-Holm equation.
On a particular class of warped products with fibres locally isometric to generalized Cartan hypersurfaces
We prove that every generalized Cartan hypersurface satisfies the so called Roter type equation. Using this fact, we construct a particular class of generalized Robertson-Walker spacetimes.
On a quasilinear elliptic equation and a Riemannian metric invariant under Möbius transformations.
On a quasilinear elliptic equation and a Riemannian metric invariant under Möbius transformations. (Summary).
On a Riemannian space of class one and its associated space
On a special almost geodesic mapping of third type of affine spaces.
On a Theorem of Chern and Terng on Affine Surfaces.