Results 21 to 30 of about 48,546 (184)

Emergent time, cosmological constant and boundary dimension at infinity in combinatorial quantum gravity

Journal of High Energy Physics, 2022
Combinatorial quantum gravity is governed by a discrete Einstein-Hilbert action formulated on an ensemble of random graphs. There is strong evidence for a second-order quantum phase transition separating a random phase at strong coupling from an ordered,
C. A. Trugenberger
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Almost Kenmotsu $f$-manifolds

Karpatsʹkì Matematičnì Publìkacìï, 2015
In this paper, we consider a generalization of almost Kenmotsu f-manifolds. We get basic Riemannian curvature, sectional curvatures and scalar curvature properties such type manifolds. Finally, we give two examples to clarify some our results.
Y.S. Balkan, N. Aktan
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On Generalized Φ- Recurrent of Kenmotsu Type Manifolds

مجلة بغداد للعلوم, 2022
          The present paper studies the generalized Φ-  recurrent of Kenmotsu type manifolds. This is done to determine the components of the covariant derivative of the Riemannian curvature tensor.
Habeeb M. Abood , Mohammed Y. Abass
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On Sectional Curvatures of (ε)-Sasakian Manifolds

International Journal of Mathematics and Mathematical Sciences, 2007
We obtain some basic results for Riemannian curvature tensor of (ε)-Sasakian manifolds and then establish equivalent relations among φ-sectional curvature, totally real sectional curvature, and totally real bisectional curvature for (ε)-Sasakian ...
Rakesh Kumar, Rachna Rani, R. K. Nagaich   +2 more
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Eigenvalues of the bi-Xin-Laplacian on complete Riemannian manifolds

Communications in Analysis and Mechanics, 2023
The clamped plate problem describes the vibration of a clamped plate in the classical elastic mechanics, and the Xin-Laplacian is an important elliptic operator for understanding the geometric structure of translators of mean curvature flow(MCF for short)
Xiaotian Hao, Lingzhong Zeng
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Anti-Invariant Semi-Riemannian Submersions from Almost Para-Hermitian Manifolds

Journal of Function Spaces and Applications, 2013
We introduce anti-invariant semi-Riemannian submersions from almost para-Hermitian manifolds onto semi-Riemannian manifolds. We give an example, investigate the geometry of foliations which are arisen from the definition of a semi-Riemannian submersion ...
Yılmaz Gündüzalp
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Some results on almost paracontact paracomplex Riemannian manifolds

AIMS Mathematics
In this study, a class of Riemannian almost product manifolds is obtained by the warped product of almost paracontact paracomplex Riemannian manifolds with $ \mathbb{R} $. The curvature properties of the almost product manifolds are studied. Then, normal
Nülifer Özdemir, Şirin Aktay, Mehmet Solgun   +2 more
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A Kähler Einstein structure on the tangent bundle of a space form

International Journal of Mathematics and Mathematical Sciences, 2001
We obtain a Kähler Einstein structure on the tangent bundle of a Riemannian manifold of constant negative curvature. Moreover, the holomorphic sectional curvature of this Kähler Einstein structure is constant.
Vasile Oproiu
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Comparison Theorems on Weighted Finsler Manifolds and Spacetimes with ϵ-Range

Analysis and Geometry in Metric Spaces, 2022
We establish the Bonnet–Myers theorem, Laplacian comparison theorem, and Bishop–Gromov volume comparison theorem for weighted Finsler manifolds as well as weighted Finsler spacetimes, of weighted Ricci curvature bounded below by using the weight function.
Lu Yufeng, Minguzzi Ettore, Ohta Shin-ichi   +2 more
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On Slant Riemannian Submersions For Cosymplectic Manifolds [PDF]

, 2013
In this paper we introduce slant Riemannian submersions from cosymplectic manifolds onto Riemannian manifolds. We obtain some results on slant Riemannian submersions of a cosymplectic manifolds.
Erken, İrem Küpeli, Murathan, Cengizhan   +1 more
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