Results 21 to 30 of about 912 (205)

Homogeneous Geodesics in 3-dimensional Homogeneous Affine Manifolds [PDF]

, 2008
summary:For studying homogeneous geodesics in Riemannian and pseudo-Riemannian geometry (on reductive homogeneous spaces) there is a simple algebraic formula which works, at least potentially, in every given case.
Kowalski, Oldřich, Dušek, Zdeněk, Zdeněk Vlášek, Oldřich Kowalski, Dmitri Alekseevsky, Vlášek, Zdeněk, Andreas Arvanitoyeorgos, Zdeněk Dušek   +7 more
core   +1 more source

Homogeneous Geodesics in Generalized Wallach Spaces [PDF]

Bulletin of the Belgian Mathematical Society - Simon Stevin, 2017
We classify generalized Wallach spaces which are g.o. spaces. We also investigate homogeneous geodesics in generalized Wallach spaces for any given invariant Riemannian metric and we give some examples.
Arvanitoyeorgos, Andreas, Wang, Yu
openaire   +4 more sources

Polar Actions on Berger Spheres [PDF]

, 2006
The object of this article is to study a torus action on a so-called Berger sphere. We also make some comments on polar actions on naturally reductive homogeneous spaces. Finally, we prove a rigidity-type theorem for Riemannian manifolds carrying a polar
ANTONIO J. DI SCALA, Di Scala, Antonio Jose'   +1 more
core   +1 more source

Geodesic vectors of (α, β)-metrics on hypercomplex 4-dimensional Lie groups [PDF]

Journal of Hyperstructures
In this paper, we consider invariant (α, β)-metrics and describe all geodesic vectors and investigate the set of all homogeneous geodesics on left invariant hypercomplex four dimensional simply connected Lie groups.
Milad Zeinali Laki, Dariush Latifi
doaj   +1 more source

Noncommutative spaces of worldlines

Physics Letters B, 2019
The space of time-like geodesics on Minkowski spacetime is constructed as a coset space of the Poincaré group in (3+1) dimensions with respect to the stabilizer of a worldline.
Angel Ballesteros, Ivan Gutierrez-Sagredo, Francisco J. Herranz   +2 more
doaj   +1 more source

Hawking-Like Radiation from the Trapping Horizon of Both Homogeneous and Inhomogeneous Spherically Symmetric Spacetime Model of the Universe

Entropy, 2016
The present work deals with the semi-classical tunnelling approach and the Hamilton–Jacobi method to study Hawking radiation from the dynamical horizon of both the homogeneous Friedmann–Robertson–Walker (FRW) model and the inhomogeneous Lemaitre–Tolman ...
Subenoy Chakraborty, Subhajit Saha, Christian Corda   +2 more
doaj   +1 more source

Emergence of curved light-cones in a class of inhomogeneous Luttinger liquids

SciPost Physics, 2017
The light-cone spreading of entanglement and correlation is a fundamental and ubiquitous feature of homogeneous extended quantum systems. Here we point out that a class of inhomogenous Luttinger liquids (those with a uniform Luttinger parameter $K ...
Jérôme Dubail, Jean-Marie Stéphan, Pasquale Calabrese
doaj   +1 more source

Sphere and projective space of a C*-algebra with a faithful state

Demonstratio Mathematica, 2019
Let 𝒜 be a unital C*-algebra with a faithful state ϕ. We study the geometry of the unit sphere 𝕊ϕ = {x ∈ 𝒜 : ϕ(x*x) = 1} and the projective space ℙϕ = 𝕊ϕ/𝕋.
Antunez Andrea C.
doaj   +1 more source

Towards Advanced Intelligent and Perceptive Soft Grippers

Advanced Intelligent Systems, EarlyView.
Implementing soft yet strong and intelligent soft grippers request innovative and creative solutions in designing soft bodies and seamlessly integrating actuated systems with hierarchical sensing. This review systematically analyses soft grippers with a deep understanding of core components, from fundamental design principles to actuation and sensing ...
Haneul Kim, Hayeon Shin, Seik Park, Changbeom Shim, Seonggun Joe   +4 more
wiley   +1 more source

Doubling Property for BiLipschitz Homogeneous Geodesic Surfaces [PDF]

Journal of Geometric Analysis, 2010
26 pages, 2 figures, final ...
openaire   +4 more sources