Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Nakova, Galia"'
Autor:
Nakova, Galia, Zamkovoy, Simeon
Object of study in the present paper are slant and Legendre null curves in 3-dimensional Sasaki-like almost contact B-metric manifolds. For the examined curves we express the general Frenet frame and the Frenet frame for which the original parameter
Externí odkaz:
http://arxiv.org/abs/2008.04767
Autor:
Nakova, Galia
We introduce a new type of slant curves in almost contact B-metric manifolds, called $\varphi $-slant curves, by an additional condition which is specific for these manifolds. In this paper we study $\varphi $-slant null curves in a class of 3-dimens
Externí odkaz:
http://arxiv.org/abs/2005.05312
Autor:
Nakova, Galia
The present paper is a continuation of our previous work, where a class of half lightlike submanifolds of almost contact B-metric manifolds was introduced. We study curvature properties of totally and screen totally umbilical such submanifolds as wel
Externí odkaz:
http://arxiv.org/abs/2003.08789
Autor:
Nakova, Galia
We introduce a class of half lightlike submanifolds of almost contact B-metric manifolds and prove that such submanifolds are semi-Riemannian with respect to the associated B-metric. Object of investigations are also minimal of the considered submani
Externí odkaz:
http://arxiv.org/abs/2003.06605
Almost para-Hermitian and almost paracontact metric structures induced by natural Riemann extensions
Autor:
Bejan, Cornelia-Livia, Nakova, Galia
In this paper we consider a manifold $(M,\nabla )$ with a symmetric linear connection $\nabla $ which induces on the cotangent bundle $T^*M$ of $M$ a semi-Riemannian metric $\overline g$ with a neutral signature. The metric $\overline g$ is called na
Externí odkaz:
http://arxiv.org/abs/1803.09213
Autor:
Zamkovoy, Simeon, Nakova, Galia
This paper is a continuation of our previous work, where eleven basic classes of almost paracontact metric manifolds with respect to the covariant derivative of the structure tensor field were obtained. First we decompose one of the eleven classes in
Externí odkaz:
http://arxiv.org/abs/1705.10179
Autor:
Nakova, Galia, Manev, Hristo
In this paper we initiate the study of submanifolds of almost hypercomplex manifolds with Hermitian and Norden metrics. Object of investigations are holomorphic submanifolds of the hypercomplex manifolds which are locally conformally equivalent to th
Externí odkaz:
http://arxiv.org/abs/1605.02286
Autor:
Nakova, Galia, Manev, Hristo
In this paper we study slant null curves with respect to the original parameter on 3-dimensional normal almost contact B-metric manifolds with parallel Reeb vector field. We prove that for non-geodesic such curves there exists a unique Frenet frame f
Externí odkaz:
http://arxiv.org/abs/1511.08037
Autor:
Bejan, Cornelia-Livia1 (AUTHOR) bejanliv@yahoo.com, Nakova, Galia2 (AUTHOR) gnakova@gmail.com, Blaga, Adara M.3 (AUTHOR) adarablaga@yahoo.com
Publikováno v:
Axioms (2075-1680). Apr2023, Vol. 12 Issue 4, p336. 11p.
Autor:
Nakova, Galia
In this paper we study curvature properties of semi-symmetric type of totally umbilical radical transversal lightlike hypersurfaces $(M,g)$ and $(M,\widetilde g)$ of a K\"ahler-Norden manifold $(\overline M,\overline J,\overline g,\overline {\widetil
Externí odkaz:
http://arxiv.org/abs/1407.6924