Results 111 to 120 of about 75,365 (285)

AdS geometry from CFT on a general conformally flat manifold

open access: yesNuclear Physics B, 2018
We construct an anti-de-Sitter (AdS) geometry from a conformal field theory (CFT) defined on a general conformally flat manifold via a flow equation associated with the curved manifold, which we refer to as the primary flow equation.
Sinya Aoki, Shuichi Yokoyama
doaj   +1 more source

Einstein structure of four-manifolds

open access: yesJournal of Geometry and Physics
v3: 27 pages, 1 figure, Sections 4 & 5 added; to appear in Journal of Geometry and ...
Jeongwon Ho   +2 more
openaire   +2 more sources

Identifying Constant Curvature Manifolds, Einstein Manifolds, and Ricci Parallel Manifolds [PDF]

open access: yesThe Journal of Geometric Analysis, 2018
We establish variational formulas for Ricci upper and lower bounds, as well as a derivative formula for the Ricci curvature. As applications, constant curvature manifolds, Einstein manifolds and Ricci parallel manifolds are identified, respectively, with different integral-differential formulas and semigroup inequalities.
openaire   +4 more sources

Optimization of light spectrum and intensity to enhance growth and metabolite profiles in green and purple radish microgreens cultivated in a vertical farming system

open access: yesJournal of the Science of Food and Agriculture, EarlyView.
Abstract BACKGROUND Microgreens have emerged as a promising crop in vertical farming due to their high nutritional value and short growth cycles. Light spectrum and intensity are critical factors influencing biomass production and metabolic activity in plants, particularly in controlled environments such as vertical farming systems. This study aimed to
Cristian Hernández‐Adasme   +6 more
wiley   +1 more source

N(κ)-paracontact metric manifolds admitting the Fischer-Marsden conjecture

open access: yesAIMS Mathematics
We characterize $ N(\kappa) $-paracontact metric manifolds (NKPMM) $ M^{2n+1} $ satisfying the Fischer-Marsden conjecture. We demostrate that, if an $ M^{2n+1} $ satisfies the Fischer-Marsden equation, then either $ M^{2n+1} $ with $ \kappa > -1 ...
Sudhakar Kumar Chaubey   +2 more
doaj   +1 more source

On Calabi's Inhomogeneous Einstein-Kaehler Manifolds [PDF]

open access: yesProceedings of the American Mathematical Society, 1977
We use some information on Lie groups to replace a long computation of Calabi, proving that certain complete Einstein-Kaehler manifolds are not locally homogeneous, and finding their isometry groups.
openaire   +2 more sources

Long‐Range Exciton Energy Transfer in Two‐Dimensional Materials

open access: yesLaser &Photonics Reviews, EarlyView.
This review highlights recent advances in long‐range exciton energy transfer within planar 2D‐material architectures. It emphasizes the emergence of self‐hybridized excitonpolaritons, exciton coupling to surface plasmon polaritons and plasmonic lattices, and the role of dipoledipole transfer pathways in enabling efficient nanoscale energy transport ...
Paul H. Bittorf   +8 more
wiley   +1 more source

Generalized pseudo Ricci symmetric manifolds with semi-symmetric metric connection

open access: yesKuwait Journal of Science, 2014
In this paper, firstly an example of a manifold with almost constant curvature and nearly quasi constant curvature which is neither quasi Einstein nor nearly quasi Einstein is given.
SEZGIN ALTAY DEMIRBAG
doaj  

Unveiling New Perspectives on the Hirota–Maccari System With Multiplicative White Noise

open access: yesMathematical Methods in the Applied Sciences, EarlyView.
ABSTRACT In this study, we delve into the stochastic Hirota–Maccari system, which is subjected to multiplicative noise according to the Itô sense. The stochastic Hirota–Maccari system is significant for its ability to accurately model how stochastic affects nonlinear wave propagation, providing valuable insights into complex systems like fluid dynamics
Mohamed E. M. Alngar   +3 more
wiley   +1 more source

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