Results 41 to 50 of about 1,223,041 (189)

Elementary approach to homogeneous C*-algebras [PDF]

, 2012
A C*-algebra is n-homogeneous (where n is finite) if every its nonzero irreducible representation acts on an n-dimensional Hilbert space. An elementary proof of Fell's characterization of n-homogeneous C*-algebras (by means of their spectra) is presented.
Niemiec, Piotr
core   +1 more source

A Classification of Compact Cohomogeneity One Locally Conformal Kähler Manifolds

Mathematics
In this paper, we apply a result of the classification of a compact cohomogeneity one Riemannian manifold with a compact Lie group G to obtain a classification of compact cohomogeneity one locally conformal Kähler manifolds.
Daniel Guan
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

On the Geometry of Three-dimensional Pseudo-Riemannian Homogeneous Spaces. II [PDF]

Известия Саратовского университета. Новая серия: Математика. Механика. Информатика, 2020
The problem of establishing links between the curvature and the topological structure of a manifold is one of the important problems of the geometry. In general, the purpose of the research of manifolds of various types is rather complicated.
Mozhey, Natal’ya Pavlovna
doaj   +1 more source

Diameters of Homogeneous Spaces [PDF]

Mathematical Research Letters, 2003
Let G be a compact connected Lie group with trivial center. Using the action of G on its Lie algebra, we define an operator norm | |_{G} which induces a bi-invariant metric d_G(x,y)=|Ad(yx^{-1})|_{G} on G. We prove the existence of a constant \approx .12 (independent of G) such that for any closed subgroup H \subsetneq G, the diameter of the quotient
Freedman, Michael H., Kitaev, Alexei, Lurie, Jacob   +2 more
openaire   +3 more sources

Classifying homogeneous ultrametric spaces up to coarse equivalence

, 2019
For every metric space $X$ we introduce two cardinal characteristics $\mathrm{cov}^\flat(X)$ and $\mathrm{cov}^\sharp(X)$ describing the capacity of balls in $X$.
Banakh, Taras, Repovš, Dušan
core   +2 more sources

Clifford-Wolf homogeneous Finsler metrics on spheres [PDF]

, 2013
An isometry of a Finsler space is called Clifford-Wolf translation (CW-translation) if it moves all points the same distance. A Finsler space $(M, F)$ is called Clifford-Wolf homogeneous (CW-homogeneous) if for any $x, y\in M$ there is a CW-translation $\
Deng, Shaoqiang, Xu, Ming
core  

Boundedness of homogeneous fractional integral operator on Morrey space

Journal of Inequalities and Applications, 2016
For 0 < α < n ...
Siying Meng, Yanping Chen
doaj   +1 more source

New Types of Almost Countable Dense Homogeneous Space

International Journal of Mathematics and Mathematical Sciences, 2010
In 1972, Bennett studied the countable dense homogeneous (CDH) spaces and in 1992, Fitzpatrick, White, and Zhou proved that every CDH space is a T1 space.
Abdalla Tallafha, Ahmed Al-Rawashdeh
doaj   +1 more source

The regularity criterion for weak solutions to the n-dimensional Boussinesq system

Boundary Value Problems, 2017
We consider the Boussinesq system in the homogeneous spaces of degree −1. To narrow the gap for the existence of small regular solutions in B ˙ ∞ , ∞ − 1 ( R n ) $\dot{B}^{-1}_{\infty,\infty}(\mathbb{R}^{n})$ , the biggest homogeneous space of degree −1 ...
Xiaona Cui
doaj   +1 more source