Results 61 to 70 of about 1,430 (88)

On the Kähler-likeness on almost Hermitian manifolds

open access: yesComplex Manifolds, 2019
We define a Kähler-like almost Hermitian metric. We will prove that on a compact Kähler-like almost Hermitian manifold (M2n, J, g), if it admits a positive ∂ ̄∂-closed (n − 2, n − 2)-form, then g is a quasi-Kähler metric.
Kawamura Masaya
doaj   +1 more source

On the partial parallelizable manifolds and associated invariants

open access: yesAnnals of the West University of Timisoara: Mathematics and Computer Science
Our idea is to use the global diffeomorphism group G (M) to study certain properties of differentiable manifolds endowed with global vector fields. We define a partial parallelizable manifold (p.p.m.) as a couple (M, ρp), where ρp is a global partial ...
Apreutesei Costache
doaj   +1 more source

On tangent bundles of Walker four-manifolds

open access: yesOpen Mathematics
The aim of this study is to explore the complete lifts of almost Norden structures on tangent bundles of Walker four-manifolds. Furthermore, we examine the integrability conditions of the complete lifts JC{J}^{C} of the proper almost complex structure ...
Çayir Haşim   +2 more
doaj   +1 more source

Commuting Conditions of the k-th Cho operator with the structure Jacobi operator of real hypersurfaces in complex space forms

open access: yesOpen Mathematics, 2015
In this paper three dimensional real hypersurfaces in non-flat complex space forms whose k-th Cho operator with respect to the structure vector field ξ commutes with the structure Jacobi operator are classified.
Panagiotidou Konstantina   +1 more
doaj   +1 more source

The β-Flatness Condition in CR Spheres

open access: yesAdvanced Nonlinear Studies, 2017
This work is an adaptation of one of the methods based on the variational critical points at infinity theory of Abbas Bahri [1, 3, 2, 4, 5, 6, 7, 8] to the Cauchy–Riemann settings.
Gamara Najoua, Hafassa Boutheina
doaj   +1 more source

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

open access: yesNuclear 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

Curvature properties of φ-null Osserman Lorentzian S-manifolds

open access: yesOpen Mathematics, 2014
Brunetti Letizia, Caldarella Angelo
doaj   +1 more source

User perception of a new hydrophilic-coated male urinary catheter for intermittent use. [PDF]

open access: yesNurs Open, 2019
Koeter I   +8 more
europepmc   +1 more source

Home - About - Disclaimer - Privacy