Results 81 to 90 of about 139,893 (132)

On minimality of al­most contact metric hypersurfaces in almost Hermitian manifolds

open access: yesДифференциальная геометрия многообразий фигур
We consider obtained in 2024 by M. Y. Abass a minimality criterion for hypersurfaces with classical generalized Kenmotsu structure in a Vaisman — Gray manifold.
A. Abu-Saleem   +2 more
doaj   +1 more source

The smallest dimension submanifolds of para ?-kenmotsu manifold

open access: yes, 2016
In this paper, we have studied the smallest dimensional submanifold of para ?-Kenmotsu manifold. Necessary and sufficient conditions are given on 3-dimensional submanifolds of a 5-dimensional para ?-Kenmotsu manifold to be a slant submanifold. After that,
Sari R., Turgut Vanli A.
core  

HYPERBOLIC KENMOTSU MANIFOLD ADMITTING A NEW TYPE OF SEMI-SYMMETRIC NON-METRIC CONNECTION [PDF]

open access: yes
In this work, we study a new type of semi-symmetric non-metric connection on hyperbolic Kenmotsu manifold. Some Riemannian curvature’s characteristics on hyperbolic Kenmotsu manifold are investigated. The properties of semi-symmetric, locally ϕ-symmetric
Singh, Abhishek   +3 more
core   +2 more sources

On nonexistence of Kenmotsu structure on аст-hypersurfaces of cosymplectic type of a Kählerian manifold

open access: yesДифференциальная геометрия многообразий фигур, 2019
Almost contact metric (аст-)structures induced on oriented hypersur­fa­ces of a Kählerian manifold are considered in the case when these аст-struc­tures are of cosymplectic type, i. e. the contact form of these struc­tu­res is closed. As it is known, the
G. Banaru
doaj   +1 more source

On special submanifolds of an α - Kenmotsu Manifold [PDF]

open access: yes, 2014
In this paper, we study some special type of submanifolds such as Z-umbilical submanifolds associated with an M-vector field Z on a submanifold M of an α- Kenmotsu manifold M and we find some interesting results.Bu çalışmada bir α- Kenmotsu manifoldunun
Doğan, Saadet, Karadağ, Müge
core  

A class of 3-dimensional almost Kenmotsu manifolds with harmonic curvature tensors

open access: yesOpen Mathematics, 2016
Let M3 be a three-dimensional almost Kenmotsu manifold satisfying ▽ξh = 0. In this paper, we prove that the curvature tensor of M3 is harmonic if and only if M3 is locally isometric to either the hyperbolic space ℍ3(-1) or the Riemannian product ℍ2(−4) ×
Wang Yaning
doaj   +1 more source

On W2-Curvature Tensor in a Kenmotsu Manifold

open access: yes, 2016
[[abstract]]The purpose of this paper is to study some properties of W2-curvature tensor in Riemannian and Kenmotsu ...
Giteshwari Pandey   +2 more
core  

Semi-Invariant Submanifolds A Lorentzian Kenmotsu Manifold With Semi-Symmetric Metric Connection

open access: yes, 2021
In this paper, semi-invariant submanifolds of a lorentzian Kenmotsu manifold endowed with a semi-symmetric metric connection are studied. Necessary and sufficient conditions are given on a submanifold of a lorentzian Kenmotsu manifold to be semi ...
Ünal, İnan, Sarı, Ramazan
core  

ON A SEMI-SYMMETRIC NON-METRIC CONNECTION IN AN ALMOST KENMOTSU MANIFOLD WITH NULLITY DISTRIBUTION [PDF]

open access: yes, 2016
We consider a semisymmetric non-metric connection in an almost Kenmotsu manifold with its characteristic vector field $\xi$ belonging to the $(k,\mu)'$-nullity distribution.
Ghosh, Gopal
core  

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