On a class of Ricci-recurrent manifolds.
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 Riemannian space of class one and its associated space
On almost geodesic mappings between semisymmetric Riemannian spaces.
On almost pseudo-conformally symmetric Ricci-recurrent manifolds with applications to relativity
The object of the present paper is to study almost pseudo-conformally symmetric Ricci-recurrent manifolds. The existence of almost pseudo-conformally symmetric Ricci-recurrent manifolds has been proved by an explicit example. Some geometric properties have been studied. Among others we prove that in such a manifold the vector field corresponding to the 1-form of recurrence is irrotational and the integral curves of the vector field are geodesic. We also study some global properties of such a...
On certain curvature conditions on Riemannian manifolds
On certain four-dimensional almost Kähler manifolds
We study four-dimensional almost Kähler manifolds (M,g,J) which admit an opposite almost Kähler structure.
On closed concircular almost contact Riemannian manifolds.
On conformal collineations
On conformally 2-recurrent spaces
On conformally birecurrent Ricci-recurrent manifolds
On conformally recurrent Ricci-recurrent manifolds
On conformally related conformally recurrent metrics. I. Some general results
On conformally symmetric 2-Ricci-recurrent spaces
On conformally symmetric Ricci-recurrent spaces
On Curvature Characterizations of Some Hypersurfaces in Spaces of Constant Curvature
On curvature collineations on simple conformally recurrent manifolds
On Decomposable Almost Pseudo Conharmonically Symmetric Manifolds
The object of the present paper is to study decomposable almost pseudo conharmonically symmetric manifolds.
On density concomitants of the covariant curvature tensor in the two- and three-dimensional Riemann space
On -planar mappings of (pseudo-) Riemannian manifolds
We study special -planar mappings between two -dimensional (pseudo-) Riemannian manifolds. In 2003 Topalov introduced -projectivity of Riemannian metrics, . Later these mappings were studied by Matveev and Rosemann. They found that for they are projective. We show that -projective equivalence corresponds to a special case of -planar mapping studied by Mikeš and Sinyukov (1983) and -planar mappings (Mikeš, 1994), with . Moreover, the tensor is derived from the tensor and the non-zero...