Results 21 to 30 of about 1,908 (95)

Special Standard Static Space-Times [PDF]

, 2004
Essentially, some conditions for the Riemannian factor and the warping function of a standard static space-time are obtained in order to guarantee that no nontrivial warping function on the Riemannian factor can make the standard static space-time ...
Dobarro, Fernando, Unal, Bulent
core   +1 more source

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
openaire   +4 more sources

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.
openaire   +2 more sources

Decomposing Quantum Fields on Branes [PDF]

, 2000
We provide a method to decompose the two-point function of a quantum field on a warped manifold in terms of fields living on a lower-dimensional manifold. We discuss explicit applications to Minkowski, de Sitter and anti-de Sitter quantum field theories.
Bateman, Bateman, Bertola, Bertola, Bertola, Bertola, Bertola, Bertola, Birrell, Bros, Bros, Bros, Bros, Bunch, Deser, Gibbons, Giddings, Gradshteyn, Itzykson, Jacques Bros, Källen, Maldacena, Marco Bertola, Moschella, O'Neill, Randall, Reed, Richard Schaeffer, Streater, Titchmarsh, Ugo Moschella, Vittorio Gorini, Wald   +32 more
core   +2 more sources

Warped Tori with Almost Non-Negative Scalar Curvature

, 2018
For sequences of warped product metrics on a $3$-torus satisfying the scalar curvature bound $R_j \geq -\frac{1}{j}$, uniform upper volume and diameter bounds, and a uniform lower area bound on the smallest minimal surface, we find a subsequence which ...
Allen, Brian, Hernandez-Vazquez, Lisandra, Parise, Davide, Payne, Alec, Wang, Shengwen   +4 more
core   +1 more source

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, Mohamd Saleem Lone, Mohammad Hasan Shahid   +2 more
openaire   +3 more sources

Curvature of Multiply Warped Products

, 2004
In this paper, we study Ricci-flat and Einstein Lorentzian multiply warped products. We also consider the case of having constant scalar curvatures for this class of warped products.
Allison, Allison, Allison, Alías, Ambrosetti, Aubin, Badiale, Bañados, Bañados, Beem, Beem, Beem, Beem, Beem, Beem, Besse, Bishop, Bülent Ünal, Chabrowski, Chen, Choi, Choi, Coti Zelati, Dobarro, Duggal, Ehrlich, Ehrlich, Ehrlich, Fernando Dobarro, Fernández-López, Flores, Flores, Folland, Ganchev, Gebarowski, Harvey, Hawking, Hong, Kasner, Katanaev, Kazdan, Kim, Kim, Kim, Kobayashi, Kobayashi, Koike, Kramer, Lohnherr, Matínez, Mikkelsen, Misner, O’Neill, Romero, Socorro, Sánchez, Sánchez, Sánchez, Zhang, Ünal, Ünal   +60 more
core   +1 more source

Doubly warped product submanifolds of (κ,μ)-contact metric manifolds

Annales Polonici Mathematici, 2011
We establish sharp inequalities for C-totally real doubly warped product submanifolds in (kappa, mu)-contact space forms and in non-Sasakian (kappa, mu)-contact metric manifolds.
Sular, Sibel, Özgür, Cihan
openaire   +4 more sources

On Ricci Solitons and Curvature Properties of Doubly Warped Products with QSMC

Axioms
This paper explores the geometric interplay between the Levi–Civita connection and the quarter-symmetric metric connection on doubly warped product manifolds.
Md Aquib, Vaishali Sah, Sarvesh Kumar Yadav, Jaya Upreti   +3 more
doaj   +1 more source

Biharmonic maps between doubly warped product manifolds

, 2008
In this paper biharmonic maps between doubly warped product manifolds are studied. We show that the inclusion maps of Riemannian manifolds $B$ and $F$ into the doubly warped product $_{f}B\times_{b}F$ can not be proper biharmonic maps. Also we analyze the conditions for the biharmonicity of projections $_{f}B\times_{b}F\to B$ and $_{f}B\times_{b}F\to F$
Perktaş, Selcen Yüksel, Kılıç, Erol
openaire   +2 more sources