Results 41 to 50 of about 3,067,810 (315)

On Generalized D-Conformal Deformations of Certain Almost Contact Metric Manifolds

Mathematics, 2019
In this work, we consider almost contact metric manifolds. We investigate the generalized D-conformal deformations of nearly K-cosymplectic, quasi-Sasakian and β -Kenmotsu manifolds.
Nülifer Özdemir, Şirin Aktay, Mehmet Solgun   +2 more
doaj   +1 more source

A note about almost contact metric hypersurfaces axioms for almost Hermitian manifolds

Дифференциальная геометрия многообразий фигур
From 1950s, it is known that an almost contact metric structure is in­duced on an arbitrary oriented hypersurface in an almost Hermitian mani­fold. In accordance with the definition, an almost Hermitian manifold satisfies the axiom of almost contact ...
A. Abu-Saleem, M. B. Banaru, G. A. Banaru   +2 more
doaj   +1 more source

$K$-contact generalized square Finsler manifolds [PDF]

AUT Journal of Mathematics and Computing
We study almost contact generalized square Finsler manifolds and introduce the notion of $K$-contact Finsler structures. Then, we characterize generalized square $K$-contact almost contact manifolds.
Hannaneh Faraji, Behzad Najafi Saghezchi, Tayebeh Tabatabaeifar   +2 more
doaj   +1 more source

Contact-Complex Riemannian Submersions

Mathematics, 2021
A submersion from an almost contact Riemannian manifold to an almost Hermitian manifold, acting on the horizontal distribution by preserving both the metric and the structure, is, roughly speaking a contact-complex Riemannian submersion. This paper deals
Cornelia-Livia Bejan, Şemsi Eken Meriç, Erol Kılıç   +2 more
doaj   +1 more source

On Products Of Generalized Geometries [PDF]

, 2014
In this paper we address what generalized geometric structures are possible on products of spaces that each admit generalized geometries. In particular we consider, first, the product of two odd dimensional spaces that each admit a generalized almost ...
Gomez, Ralph R., Talvacchia, Janet
core   +3 more sources

Invariant almost contact structure on the real extension of a sphere

Учёные записки Казанского университета: Серия Физико-математические науки
The existence of contact and almost contact metric structures invariant under the group of motions on the real extension of a two-dimensional sphere with a Riemannian direct product metric was examined.
M. V. Sorokina, Y. V. Morshchinkina
doaj   +1 more source

Hyperbolic normal almost contactmetric hypersurfaces in Euclidean 4-dimensional space

Lietuvos Matematikos Rinkinys, 2005
In Euclidean 4-dimensional space, all hyper surfaces with normal almost contact metric structure of hyperbolic type as well as hyperbolic Sasakian structure are found.
Angelė Baškienė
doaj   +3 more sources

On subcritically Stein fillable 5-manifolds

, 2017
We make some elementary observations concerning subcritically Stein fillable contact structures on 5-manifolds. Specifically, we determine the diffeomorphism type of such contact manifolds in the case the fundamental group is finite cyclic, and we show ...
Ding, Fan, Geiges, Hansjörg, Zhang, Guangjian   +2 more
core   +1 more source

A dimensional restriction for a class of contact manifolds

Demonstratio Mathematica, 2017
In this work we consider a class of contact manifolds (M, η) with an associated almost contact metric Structure (ϕ, ξ, η, g). This class contains, for example, nearly cosymplectic manifolds and the manifolds in the class C9 ⊕ C10 defined by Chinea and ...
Loiudice Eugenia
doaj   +1 more source

The Schouten-van Kampen affine connection adapted to an almost (para) contact metric structure

, 2013
We study the Schouten-van Kampen connection associated to an almost contact or paracontact metric structure. With the help of such a connection, some classes of almost (para) contact metric manifolds are characterized.
Olszak, Zbigniew
core   +1 more source