Results 11 to 20 of about 1,268 (101)

Some Properties of Curvature Tensors and Foliations of Locally Conformal Almost Kähler Manifolds

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2021
We investigate a class of locally conformal almost Kähler structures and prove that, under some conditions, this class is a subclass of almost Kähler structures.
Ntokozo Sibonelo Khuzwayo   +1 more
doaj   +1 more source

On the Canonical Foliation of an Indefinite Locally Conformal Kähler Manifold with a Parallel Lee Form

open access: yesMathematics, 2021
We study the semi-Riemannian geometry of the foliation F of an indefinite locally conformal Kähler (l.c.K.) manifold M, given by the Pfaffian equation ω=0, provided that ∇ω=0 and c=∥ω∥≠0 (ω is the Lee form of M).
Elisabetta Barletta   +2 more
doaj   +1 more source

Hidden Symmetries of Euclideanised Kerr-NUT-(A)dS Metrics in Certain Scaling Limits [PDF]

open access: yes, 2012
The hidden symmetries of higher dimensional Kerr-NUT-(A)dS metrics are investigated. In certain scaling limits these metrics are related to the Einstein-Sasaki ones.
Vilcu, Gabriel Eduard, Visinescu, Mihai
core   +3 more sources

On Generic submanifolds of a locally conformal Kahler manifold with parallel canonical structures

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1995
The study of CR-submanifolds of a Kähler manifold was initiated by Bejancu [1]. Since then many papers have appeared on CR-submanifolds of a Kähler manifold.
M. Hasan shahid, A. Sharfuddin
doaj   +1 more source

The Concircular Curvature Tensor Of The Locally Conformal Kahler Manifold

open access: yesTikrit Journal of Pure Science, 2019
In this research, we are calculated components conharmonic curvature tensor in some aspects Hermeation manifolding in particular of the Locally Conformal Kahler manifold.
Ali Abdalmajed. Shihab   +1 more
doaj   +1 more source

Parallel mean curvature surfaces in four-dimensional homogeneous spaces [PDF]

open access: yes, 2017
We survey different classification results for surfaces with parallel mean curvature immersed into some Riemannian homogeneous four-manifolds, including real and complex space forms, and product spaces.
Manzano, José M.   +2 more
core   +1 more source

Locally conformal symplectic nilmanifolds with no locally conformal Kähler metrics

open access: yesComplex Manifolds, 2017
We report on a question, posed by L. Ornea and M. Verbitsky in [32], about examples of compact locally conformal symplectic manifolds without locally conformal Kähler metrics.
Bazzoni Giovanni, Marrero Juan Carlos
doaj   +1 more source

Example of a six-dimensional LCK solvmanifold

open access: yesComplex Manifolds, 2017
The purpose of this paper is to prove that there exists a lattice on a certain solvable Lie group and construct a six-dimensional locally conformal Kähler solvmanifold with non-parallel Lee form.
Sawai Hiroshi
doaj   +1 more source

Topological AdS/CFT

open access: yesJournal of High Energy Physics, 2017
We define a holographic dual to the Donaldson-Witten topological twist of N=2 $$ \mathcal{N}=2 $$ gauge theories on a Riemannian four-manifold. This is described by a class of asymptotically locally hyperbolic solutions to N=4 $$ \mathcal{N}=4 $$ gauged ...
Pietro Benetti Genolini   +2 more
doaj   +1 more source

Cohomologies of locally conformally symplectic manifolds and solvmanifolds [PDF]

open access: yes, 2017
We study the Morse-Novikov cohomology and its almost-symplectic counterpart on manifolds admitting locally conformally symplectic structures. More precisely, we introduce lcs cohomologies and we study elliptic Hodge theory, dualities, Hard Lefschetz ...
Angella, Daniele   +2 more
core   +2 more sources

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