Results 21 to 30 of about 133 (98)
Conformal Vector Fields on Doubly Warped Product Manifolds and Applications [PDF]
Advances in Mathematical Physics, 2016 This article aimed to study and explore conformal vector fields on doubly warped product manifolds as well as on doubly warped spacetime. Then we derive sufficient conditions for matter and Ricci collineations on doubly warped product manifolds. A special attention is paid to concurrent vector fields.
H. K. El-Sayied +2 more
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Warped-Twisted Product Semi-Slant Submanifolds
, 2022 We introduce the notion of warped-twisted product semi-slant submanifolds of the form f2MT?f1 M? with warping function f2 on M? and twisting function f1, where MT is a holomorphic and M?
Taştan, Hakan Mete +4 more
core +1 more source
, 2020 We give a new characterization for doubly warped products by using the geometry of their canonical foliations intersecting perpendicularly. We also give a necessary and su¢ cient condition for a doubly warped product to be a warped or a direct product.
Taştan, Hakan Mete +1 more
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Einstein doubly warped product manifolds with semi-symmetric metric connection
Acta Mathematica, 2020 In this paper, we study the doubly warped product manifolds with semi-symmetric metric connection. We derive the curvature formulas for doubly warped product manifold with semi-symmetric metric connection in terms of curvatures of components of doubly warped product manifolds.
Gupta, Punam, Diallo, Abdoul Salam
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Doubly Warped Product Submanifolds of a Riemannian Manifold of Nearly Quasi-constant Curvature
Tamkang Journal of Mathematics, 2021 In the present paper, we form a sharp inequality for a doubly warped product submanifold of a Riemannian manifold of nearly quasi-constant curvature.
Mehraj Ahmad Lone +2 more
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A short note on $f$-biharmonic hypersurfaces [PDF]
, 2020 summary:In the present paper we give some properties of $f$-biharmonic hypersurfaces in real space forms. By using the $f$-biharmonic equation for a hypersurface of a Riemannian manifold, we characterize the $f$-biharmonicity of constant mean curvature ...
Blaga, Adara M. +2 more
core +1 more source
An Obata-type characterization of doubly-warped product Kähler manifolds
, 2020 We give a characterization à la Obata for certain families of Kähler manifolds. These results are in the same line as other extensions of the well-known Obata rigidity theorem from [16], like for instance the generalizations in [17, 18]. Moreover, we give a complete description of the so-called Kähler doubly-warped product structures whose underlying ...
Ginoux, N. (Nicolas) +3 more
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Doubly warped product Finsler manifolds with some non-Riemannian curvature properties [PDF]
Annales Polonici Mathematici, 2012 In this paper, we consider doubly warped product (DWP) Finsler manifolds with some non-Riemannian curvature properties. First, we study Berwald and isotropic mean Berwald DWP-Finsler manifolds. Then we prove that every proper Douglas DWP-Finsler manifold is Riemannian. We show that a proper DWP-manifold is Landsbergian if and only it is Berwaldian.
Peyghan, E., Tayebi, A., Najafi, B.
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Some results on almost eta-Ricci-Bourguignon solitons
, 2021 We determine a formula to compute the defining function of a gradient almost Ricci-Bourguignon soliton by means of the potential vector field, providing in this sense two examples. We also give a rigidity result in this case.
Blaga, Adara M., Tastan, Hakan M.
core +1 more source
Small Methods, EarlyView.Quantitative dual‐color STORM imaging provides direct nanoscale measurement of protein coronas on nanoparticles in biological media. The approach reveals consistent ∼50 nm corona layers, establishing a reproducible method for characterizing the nanomaterial‐protein interfaces.
Bradley T. Cech +2 more
wiley +1 more source