Results 1 to 10 of about 521,595 (154)

Classification of surfaces in a pseudo‐sphere with 2‐type pseudo‐spherical Gauss map [PDF]

Mathematische Nachrichten, 2017
AbstractIn this article, we study submanifolds in a pseudo‐sphere with 2‐type pseudo‐spherical Gauss map. We give a characterization theorem for Lorentzian surfaces in the pseudo‐sphere with zero mean curvature vector in and 2‐type pseudo‐spherical Gauss map.
Uğur Dursun, Elif Ozkara Canfes
exaly   +5 more sources

The curious case of large-N expansions on a (pseudo)sphere

Nuclear Physics B, 2015
We elucidate the large-N dynamics of one-dimensional sigma models with spherical and hyperbolic target spaces and find a duality between the Lagrange multiplier and the angular momentum.
Alexander M. Polyakov, Zain H. Saleem, James Stokes   +2 more
doaj   +4 more sources

Surfaces in a pseudo-sphere with harmonic or 1-type pseudo-spherical Gauss map [PDF]

Annals of Global Analysis and Geometry, 2017
We give a complete classification of Riemannian and Lorentzian surfaces of arbitrary codimension in a pseudo-sphere whose pseudo-spherical Gauss maps are of 1-type or, in particular, harmonic. In some cases a concrete global classification is obtained, while in other cases the solutions are described by an explicit system of partial differential ...
Luc Vrancken, Joeri Van der Veken, Van Der Veken Joeri   +2 more
exaly   +7 more sources

Phases in noncommutative quantum mechanics on (pseudo)sphere [PDF]

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2002
We compare the non-commutative quantum mechanics (NCQM) on sphere and the discrete part of the spectrum of NCQM on pseudosphere (Lobachevsky plane, or $AdS_2$) in the presence of a constant magnetic field $B$ with planar NCQM. We show, that (pseudo)spherical NCQM has a ``critical point'', where the system becomes effectively one-dimensional, and two ...
Armen Nersessian, Stefano Bellucci
exaly   +4 more sources

Post-truth conspiracism and the pseudo-public sphere

Frontiers in Communication
Rather than seeking to recuperate the ideal of a digital public sphere or lament its demise with the rise of social media platforms, in this paper I seek to identify the dangers of precisely this insistence to imagine the Internet as a public sphere.
Daniël de Zeeuw, Daniël de Zeeuw
doaj   +3 more sources

On 1-index of Unstable Spacelike Hypersurfaces in Pseudo-Euclidean Spheres [PDF]

Sahand Communications in Mathematical Analysis, 2021
In mathematical physics, the stable hypersurfaces of constant mean curvature in pseudo-Euclidian spheres have been interested by many researchers on general relativity.
Behzad Esmaeili, Firooz Pashaie, Ghorbanali Haghighatdoost   +2 more
doaj   +1 more source

The general Racah algebra as the symmetry algebra of generic systems on pseudo-spheres [PDF]

Journal of Physics A: Mathematical and Theoretical, 2020
Abstract We characterize the symmetry algebra of the generic superintegrable system on a pseudo-sphere corresponding to the homogeneous space SO ( p , q + 1)/ SO
Ş Kuru, I Marquette, J Negro
openaire   +4 more sources

Spacelike parallels and evolutes in Minkowski pseudo-spheres

Journal of Geometry and Physics, 2007
The authors describe some results of the project constructing the extrinsic dif\-fe\-ren\-ti\-al geometry on submanifolds of Minkowski pseudo-spheres (hyperbolic space, de Sitter space and the lightcone). The authors review classification results on totally umbilic space-like hypersurfaces in pseudo-spheres.
Izumiya, Shyuichi, Takahashi, Masatomo
openaire   +5 more sources

Computation of Structure and Electrical Resistivity of Liquid Na-Rb Alloys

East European Journal of Physics, 2022
The structure and electrical resistivity of Na1-xRbx binary alloys (where x = 0, 0.1, 0.2,…,1) are computed using Percus-Yevick (PY) equation, hard-sphere model and Faber-Ziman formula respectively.
R.R. Koireng, P.C. Agarwal, Alpana Gokhroo   +2 more
doaj   +1 more source

Pseudo-Isotropic Centro-Affine Lorentzian Surfaces

Mathematics, 2020
In this paper, we study centro-affine Lorentzian surfaces M2 in ℝ3 which have pseudo-isotropic or lightlike pseudo-isotropic difference tensor. We first show that M2 is pseudo-isotropic if and only if the Tchebychev form T=0.
Olivier Birembaux
doaj   +1 more source