Results 61 to 70 of about 169,909 (330)

ON QUASI EINSTEIN MANIFOLDS

Communications of the Korean Mathematical Society, 2008
The object of the present paper is to study some properties of a quasi Einstein manifold. A non-trivial concrete example of a quasi Einstein manifold is also given.
Biman Kanti De, Uday Chand De
openaire   +3 more sources

Mimicking Symmetry‐Breaking Einstein Ring by Optical Lens

Advanced Photonics Research, EarlyView.
This article uses an optical lens to emulate the gravitational lensing effect and observe the Einstein ring (ER) patterns. The symmetry‐breaking ER, i.e., Einstein cross, is observed utilizing a rotation‐symmetry‐breaking hemi‐ellipsoid lens. Deformed Einstein cross patterns induced by noncollinearly alignment of the light source–lens–observer are ...
Jun‐Liang Duan, Wen Xiao, Minyong Guo, Tong Liu, Huanyang Chen, Jin‐Hui Chen   +5 more
wiley   +1 more source

The very possibility of contemplation: The dialectics of intellect and will in Schopenhauer's aesthetics

The Southern Journal of Philosophy, EarlyView., 2023
Abstract In this article, I explore how Schopenhauer's theory of aesthetic experience—independently of his theory of arts—accommodates the possibility of contemplation. The standard reading of his aesthetics is that contemplation becomes possible because of a certain “surplus” of intellect and facilitating external occasions. I argue, however, that the
Alexander Sattar
wiley   +1 more source

On the local structure of Lorentzian Einstein manifolds with parallel distribution of null lines

, 2010
We study transformations of coordinates on a Lorentzian Einstein manifold with a parallel distribution of null lines and show that the general Walker coordinates can be simplified. In these coordinates, the full Lorentzian Einstein equation is reduced to
Anton S Galaev, Besse A L, Boubel C, Brannlund J, Bryant R, Coley A, Figueroa-O'Farrill J M, Galaev A S, Galaev A S, Ghanam R, Gibbons G W, Gibbons G W, Koiso N, Koiso N, Leistner T, Lewandowski J, Petrov A Z, Spivak M, Thomas Leistner   +18 more
core   +2 more sources

On generalized Quasi Einstein manifolds

Filomat, 2014
Quasi Einstein manifold is a simple and natural generalization of an Einstein manifold. The object of the present paper is to study some geometric properties of generalized quasi Einstein manifolds. Two non-trivial examples have been constructed to prove the existence of a generalized quasi Einstein manifold.
De A., Yildiz A., De U.C.
openaire   +3 more sources

Acoustic Rayleigh Wave Turbulence in Soft Viscoelastic Matter

Advanced Science, EarlyView.
Discrete acoustic Rayleigh wave turbulence (DARWT) is observed on the free surface of viscoelastic materials under monochromatic excitation. Governed by bulk shear rigidity supporting inertial modes against surface tension, the nonlinear Rayleigh waves exhibit distinct power‐law scaling and turbulence features in their Kolmogorov–Zakharov spectra. This
Mikheil Kharbedia, Horacio López‐Menéndez, Basilio Javier García, Manuel G. Velarde, Francisco Monroy   +4 more
wiley   +1 more source

Some submersions of CR-hypersurfaces of Kaehler-Einstein manifold

International Journal of Mathematics and Mathematical Sciences, 2003
The Riemannian submersions of a CR-hypersurface M of a Kaehler-Einstein manifold M˜ are studied. If M is an extrinsic CR-hypersurface of M˜, then it is shown that the base space of the submersion is also a Kaehler-Einstein manifold.
Vittorio Mangione
doaj   +1 more source

Para-Kenmotsu manifolds admitting semi-symmetric structures

Acta Universitatis Sapientiae: Mathematica, 2021
The object of the present paper is to study para-Kenmotsu manifolds satisfying different conditions of semi-symmetric type.
Sarkar Nihar, Baishya Kanak Kanti, Blaga Adara M.   +2 more
doaj   +1 more source

On trans-Sasakian $3$-manifolds as $\eta$-Einstein solitons

Karpatsʹkì Matematičnì Publìkacìï, 2021
The present paper is to deliberate the class of $3$-dimensional trans-Sasakian manifolds which admits $\eta$-Einstein solitons. We have studied $\eta$-Einstein solitons on $3$-dimensional trans-Sasakian manifolds where the Ricci tensors are Codazzi type ...
D. Ganguly, S. Dey, A. Bhattacharyya
doaj   +1 more source

On the structure of almost Einstein manifolds [PDF]

Journal of the American Mathematical Society, 2015
In this paper, we study the structure of the limit space of a sequence of almost Einstein manifolds, which are generalizations of Einstein manifolds. Roughly speaking, such manifolds are the initial manifolds of some normalized Ricci flows whose scalar curvatures are almost constants over space-time in the L 1 L^1 ...
Bing Wang, Gang Tian
openaire   +3 more sources