Results 41 to 50 of about 77 (59)
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Decelerating to accelerating FRW universe with variable G and Λ in conharmonically flat space
New Astronomy, 2019Abstract General exact solutions of the Einstein’s field equations by using conharmonically flat space with variable gravitational and cosmological “constants” for a spatially homogeneous and isotropic Friedmann–Robertson–Walker (FRW) model filled with perfect fluid has been obtained.
Manish Goyal +2 more
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Role of conharmonic flatness in Friedmann cosmology
Astrophysics and Space Science, 2015In this paper, investigation of conharmonically flat FRW space-time is considered in presence of perfect fluid as a matter source. To get the deterministic model, we have employed the condition between vacuum density Λ and the Hubble parameter H as Λ=3βH2, where β is a constant (Astrophys. Space Sci. 314:83, 2008).
R K Tiwari, Rameshwar Singh, Tiwari R K
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Cosmological Models based on Artificial Intelligence Approach for Conharmonically Flat Space Time
2022 2nd International Conference on Advance Computing and Innovative Technologies in Engineering (ICACITE), 2022Anil Sharma
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Sharma–Mittal holographic dark energy model in conharmonically flat space-time
International Journal of Geometric Methods in Modern Physics, 2020In this work, we explore the accelerated expansion of the conharmonically flat space in relation to an isotropic and spatially homogeneous Friedmann–Robertson–Walker (FRW) universe through a newly proposed dark energy (DE) model namely Sharma–Mittal holographic DE (SMHDE) by taking Hubble horizon as an IR cut-off and also by considering the ...
Vipin Chandra Dubey +2 more
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Concircularly and Conharmonically Flat Warped-Twisted Product Manifolds with Applications
Istanbul Journal of Mathematicsexaly +2 more sources
International Journal of Geometric Methods in Modern Physics, 2017
Conformal, concircular, quasi-conformal and conharmonic curvature tensors play an important role in Riemannian geometry. In this paper, we study on normal complex contact metric manifolds under flatness conditions of these tensors.
TURGUT VANLI, Aysel, Ünal, İNAN
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Conformal, concircular, quasi-conformal and conharmonic curvature tensors play an important role in Riemannian geometry. In this paper, we study on normal complex contact metric manifolds under flatness conditions of these tensors.
TURGUT VANLI, Aysel, Ünal, İNAN
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ON φ-CONHARMONICALLY FLAT LORENTZIAN PARA-KENMOTSU MANIFOLDS
The present paper deals with a class of Lorentzian almost paracontact metric manifolds namely Lorentzian para-Kenmotsu (briefly LP-Kenmotsu) manifolds. We study and have shown that a quasiconformally flat Lorentzian para-Kenmotsu manifold is locally isomorphic with a unit sphere Sn(1).I.V. Venkateswara Rao +2 more
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On Conharmonically Flatness of Lorentzian a-Sasakian Manifolds
2018Conharmonically flatness of Lorentzian $\alpha$-Sasakian manifolds is characterized and some structure theorems are discussed. In this manner, conharmonically flat, $\varphi$-conharmonically flat, $\xi$-conharmonically flat and quasi-conharmonically flat Lorentzian $\alpha$-Sasakian manifolds are investigated.
Çalışkan, Nesrin +1 more
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Some geometric and physical properties of pseudo ψ-conharmonically symmetric manifolds
Quaestiones Mathematicae, 2023Krishnendu De, Uday Chand De
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