Results 91 to 100 of about 169,909 (330)
Some Homogeneous Einstein Manifolds [PDF]
Nagoya Mathematical Journal, 1970 Let G be a connected Lie group and H a closed subgroup with Lie algebra such that in the Lie algebra g of G there exists a subspace m with (subspace direct sum) and In this case the corresponding manifold M = G/H is called a reductive homogeneous space and (g,) (or (G,H)) a reductive pair.
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Singular Electromagnetics: From Phase Singularities to Optical Skyrmions and Beyond
Advanced Physics Research, EarlyView.Singular electromagnetics/optics studies multidimensional topological defects of electromagnetic fields (also known as optical singularities), including phase and polarization singularities, 3D singularities (e.g., optical skyrmions, merons, hopfions, knots, links, and Möbius strips), and even higher‐dimensional singularities.
Jie Yang +3 more
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Holonomy of Einstein Lorentzian manifolds [PDF]
Classical and Quantum Gravity, 2010 The classification of all possible holonomy algebras of Einstein and vacuum Einstein Lorentzian manifolds is obtained. It is shown that each such algebra appears as the holonomy algebra of an Einstein (resp., vacuum Einstein) Lorentzian manifold, the direct constructions are given.
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On Submanifolds of $N(k)$-Quasi Einstein Manifolds with a Type of Semi-Symmetric Metric Connection
Universal Journal of Mathematics and Applications, 2020 In this study, we consider the $ N(k)- $quasi Einstein manifolds with respect to a type of semi-symmetric metric connection. We suppose that the generator of $ N(k)- $quasi-Einstein manifolds is parallel with respect to semi-symmetric metric connection
İnan Ünal
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Einstein-Weyl structures on almost cosymplectic manifolds [PDF]
arXiv, 2018 In this article, we study Einstein-Weyl structures on almost cosymplectic manifolds. First we prove that an almost cosymplectic $(\kappa,\mu)$-manifold is Einstein or cosymplectic if it admits a closed Einstein-Weyl structure or two Einstein-Weyl structures.
arxiv
Chemistry–Methods, EarlyView.A semiempirical method is reported for the quantitative analysis of self‐diffusion coefficients (Dt) of solutes in water. Previously established correlations developed for organic solvents were adapted to aqueous systems, accounting for the ability of water to establish strong hydrogen bonding.
Francesco Zaccaria +2 more
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ON GENERALIZED φ −RECURRENT KENMOTSU MANIFOLDS
Süleyman Demirel Üniversitesi Fen-Edebiyat Fakültesi Fen Dergisi, 2009 : The purpose of this paper is to study generalized φ − recurrent Kenmotsu manifolds. Key words: Kenmotsu manifold, generalized recurrent, φ − recurrent manifold, Einstein manifold.
Aslı BAŞARI
doaj
A generalization of a 4-dimensional Einstein manifold [PDF]
arXiv, 2010 A weakly Einstein manifold is a generalization of a 4-dimensional Einstein manifold, which is defined as an application of a curvature identity derived from the generalized Gauss-Bonnet formula for a 4-dimensional compact oriented Riemannian manifold. In this paper, we shall give a characterization of a weakly Einstein manifold.
arxiv
Sasaki–Einstein Manifolds and Volume Minimisation [PDF]
Communications in Mathematical Physics, 2008 We study a variational problem whose critical point determines the Reeb vector field for a Sasaki-Einstein manifold. This extends our previous work on Sasakian geometry by lifting the condition that the manifolds are toric. We show that the Einstein-Hilbert action, restricted to a space of Sasakian metrics on a link L in a Calabi-Yau cone X, is the ...
Martelli D., Sparks J., Yau S. -T.
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Lessons Learned on Obtaining Reliable Dynamic Properties for Ionic Liquids
ChemPhysChem, EarlyView.The performance of different force fields in the calculation of transport properties of ionic liquids is studied at the example of [C2C1Im][NTf2]. Qualitatively, all investigated force field formulations yield accurate results, but to achieve quantitative agreement to reference data, either explicit polarization or a refinement of the classical Lennard‐
Tom Frömbgen +5 more
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