Results 131 to 140 of about 169,909 (330)

Ricci Curvature Bounds and Einstein Metrics on Compact Manifolds [PDF]

, 1989
Michael T. Anderson
openalex   +1 more source

Probing the out‐of‐equilibrium dynamics of driven colloids by X‐ray photon correlation spectroscopy

Journal of Applied Crystallography, EarlyView.
This article presents an application of X‐ray photon correlation spectroscopy (XPCS) to probe the out‐of‐equilibrium dynamics in a driven colloidal system. XPCS enables the investigation of direction‐dependent non‐equilibrium dynamics and the gradual return of the suspension to equilibrium Brownian behaviour.
Theyencheri Narayanan, William Chèvremont, Thomas Zinn   +2 more
wiley   +1 more source

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

AIMS 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, Meraj Ali Khan, Amna Salim Rashid Al Kaabi   +2 more
doaj   +1 more source

Einstein manifolds and obstructions to the existence of Einstein metrics [PDF]

Rendiconti di Matematica e delle Sue Applicazioni, 1998
This article is a panorama about Einstein manifolds (which has not to be intended as a complete report on the subject). We have chosen to mention some classical facts which make the notion of Einstein metric worth of investigation, and we discuss how ...
A. Sambusetti
doaj  

Rigidity for Einstein manifolds under bounded covering geometry [PDF]

arXiv
In this note we prove three rigidity results for Einstein manifolds with bounded covering geometry. (1) An almost flat manifold $(M,g)$ must be flat if it is Einstein, i.e. $\operatorname{Ric}_g=\lambda g$ for some real number $\lambda$. (2) A compact Einstein manifolds with a non-vanishing and almost maximal volume entropy is hyperbolic.
arxiv  

Moduli spaces of Einstein metrics on 4-manifolds [PDF]

, 1989
Michael T. Anderson
openalex   +1 more source

The OÆSE endstation at BESSY II: operando X‐ray absorption spectroscopy for energy materials

Journal of Synchrotron Radiation, EarlyView.
The OÆSE endstation at EMIL at the BESSY II synchrotron facility in Berlin allows real‐time investigation of energy materials through operando X‐ray absorption spectroscopy. The possibility to use soft, tender, and hard X‐rays combined with versatile operando sample environments enables the study of a wide range of energy materials under relevant ...
Raul Garcia-Diez, Johannes Frisch, Marianne van der Merwe, Romualdus Enggar Wibowo, Mihaela Gorgoi, Elmar Kataev, Catalina E. Jimenez, Mauricio D. Arce, William Smith, Wilson Quevedo-Garzon, Regan G. Wilks, Dirk Wallacher, Leonhard J. Reinschlüssel, Gülen C. Tok, Hubert A. Gasteiger, Marcus Bär   +15 more
wiley   +1 more source

On Four Dimensional Einstein Manifolds [PDF]

Communications, Faculty Of Science, University of Ankara Series A1Mathematics and Statistics, 1987
In this paper we provide a study of 4-dimensional Einstein manifolds, in particular we classify ali 4-dimensional Einstein manifolds (up to local isometry) which have tbe property that tbe metric depends on only one coordinate.Kasner (1923) considered the Solutions of the Einstein equations involving functions cf cniy one variahh.. His calculations are
openaire   +3 more sources

Genomic technologies and the diagnosis of 46, XY differences of sex development

Andrology, EarlyView.
Abstract Differences/disorders of sex development can be caused by disruptions to the molecular and cellular mechanisms that control development and sex determination of the reproductive organs with 1:100 live births affected. Multiple genes are associated with 46, XY differences/disorders of sex development that can cause varying clinical phenotypes ...
Firman Idris, Andrew H. Sinclair, Katie L. Ayers   +2 more
wiley   +1 more source

Rigidity theorems of complete Kähler-Einstein manifolds and complex space forms [PDF]

arXiv, 2014
We derive some elliptic differential inequalities from the Weitzenb\"ock formulas for the traceless Ricci tensor of a K\"ahler manifold with constant scalar curvature and the Bochner tensor of a K\"ahler-Einstein manifold respectively. Using elliptic estimates and maximum principle, some $L^p$ and $L^\infty $ pinching results are established to ...
arxiv