Results 71 to 80 of about 124 (116)

Almost Kenmotsu manifolds with conformal Reeb foliation

, 2011
We consider almost Kenmotsu manifolds with conformal Reeb foliation. We prove that such a foliation produces harmonic morphisms,we study the k-nullity distributions and we discuss the isometric immersion of such a manifold M as hypersurface in a real ...
PASTORE, Anna Maria, SALTARELLI V.
core  

Lie Groups of Fourier Integral Operators on Open Manifolds

, 2001
: We endow the group of invertible Fourier integral operators on an open manifold with the structure of an ILH Lie group. This is done by establishing such structures for the groups of invertible pseudodifferential operators and contact transformations ...
Rudolf Schmid, Jürgen Eichhorn
core  

Stochastic control of influenza spread: A Lévy-driven SDE and branching process approach

Infectious Disease Modelling
Background: Forecasting influenza outbreaks remains a significant challenge due to the complexity of disease transmission and the influence of environmental and behavioral factors.
Kazi Mehedi Mohammad, Taufiquar Khan, Md Kamrujjaman   +2 more
doaj   +1 more source

A Note on Rigidity of 3-Sasakian Manifolds

, 1998
Making use of the relations among 3-Sasakian manifolds, hypercomplex manifolds and quaternionic Kahler orbifolds, we prove that complete 3-Sasakian manifolds are rigid. Keywords: Sasakian, Hypercomplex, Deformations.
Henrik Pedersen, Yat Sun Poon
core  

*-Ricci soliton on (κ, μ)′-almost Kenmotsu manifolds

Open Mathematics, 2019
Let (M, g) be a non-Kenmotsu (κ, μ)′-almost Kenmotsu manifold of dimension 2n + 1. In this paper, we prove that if the metric g of M is a *-Ricci soliton, then either M is locally isometric to the product ℍn+1(−4)×ℝn or the potential vector field is ...
Dai Xinxin, Zhao Yan, Chand De Uday
doaj   +1 more source

The Dirac Operator on Hyperbolic Manifolds of Finite Volume

, 1998
We study the spectrum of the Dirac operator on hyperbolic manifolds of nite volume. Depending on the spin structure it is either discrete or the whole real line.
Christian Bär
core  

Symmetry and pseudosymmetry properties with Ricci soliton of the Reissner-Nordström-de Sitter spacetime

Nuclear Physics B
The primary objective of the article is to investigate the symmetry and pseudosymmetry properties of the Reissner-Nordström-de Sitter (briefly, RNdS) spacetime. The secondary aim of the paper is to explore the notion of Ricci solitons in RNdS spacetimes.
Absos Ali Shaikh, Kamiruzzaman
doaj   +1 more source

Mass and Extremals Associated with the Hardy–Schrödinger Operator on Hyperbolic Space

Advanced Nonlinear Studies, 2018
We consider the Hardy–Schrödinger operator Lγ:=-Δ𝔹n-γ⁢V2{L_{\gamma}:=-\Delta_{\mathbb{B}^{n}}-\gamma{V_{2}}} on the Poincaré ball model of the hyperbolic space 𝔹n{\mathbb{B}^{n}} (n≥3{n\geq 3}).
Chan Hardy, Ghoussoub Nassif, Mazumdar Saikat, Shakerian Shaya, de Oliveira Faria Luiz Fernando   +4 more
doaj   +1 more source

Secoond order parallel tensors on some paracontact manifolds

, 2017
The object of the present paper is to study the symmetric and skewsymmetric properties of a second order parallel tensor on paracontact metric (k;μ)- spaces and almost β-para-Kenmotsu (k;μ)-spaces.
Pan, Quanxiang, Liu, Ximin
core  

Pseudosymmetry and curvature inheritance of the interior black hole spacetime

Physics Letters B
The notion of pseudosymmetry by Adamów and Deszcz [1] generalizes the concept of local symmetry and semisymmetry, and it serves as a model of various spacetimes. The classification of pseudosymmetric spacetimes has been studied in [2].
Absos Ali Shaikh, Foued Aloui, Kamiruzzaman, Ibrahim Al-Dayel   +3 more
doaj   +1 more source