Results 31 to 40 of about 65,221 (236)

Metrik Finsler Pseudo-Konveks Kuat pada Bundel Vektor Holomorfik

open access: yesJurnal Matematika, 2017
: Rizza-negativity of holomorphic vector bundle  is a sufficient condition for the negativity of . In the present paper, we shall discuss that as a special case, using the Rizza metric  which is derived from a Hermitian metric  also implies the ...
Haripamyu ,, Jenizon ,, I Made Arnawa
doaj   +1 more source

Levi-Civita Ricci-Flat Doubly Warped Product Hermitian Manifolds

open access: yesAdvances in Mathematical Physics, 2022
Let M1,g and M2,h be two Hermitian manifolds. The doubly warped product (abbreviated as DWP) Hermitian manifold of M1,g and M2,h is the product manifold M1×M2 endowed with the warped product Hermitian metric G=f22g+f12h, where f1 and f2 are positive ...
Qihui Ni   +3 more
doaj   +1 more source

On the Geometry of Connections with Totally Skew-Symmetric Torsion on Manifolds with Additional Tensor Structures and Indefinite Metrics [PDF]

open access: yes, 2010
This paper is a survey of results obtained by the authors on the geometry of connections with totally skew-symmetric torsion on the following manifolds: almost complex manifolds with Norden metric, almost contact manifolds with B-metric and almost ...
Gribachev, Kostadin   +2 more
core   +1 more source

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 most important achievements of V. F. Kirichenko in Theory of differentiable manifolds

open access: yesДифференциальная геометрия многообразий фигур, 2023
We mark out the most important results obtained by outstanding Rus­sian geometer Vadim Feodorovich Kirichenko in the theory of almost Hermitian and almost contact metric manifolds.
M. B. Banaru, G. A. Banaru
doaj   +1 more source

Pseudo-Hermiticity, PT-symmetry, and the Metric Operator [PDF]

open access: yes, 2005
The main achievements of Pseudo-Hermitian Quantum Mechanics and its distinction with the indefinite-metric quantum theories are reviewed. The issue of the non-uniqueness of the metric operator and its consequences for defining the observables are ...
A. Mostafazadeh   +15 more
core   +2 more sources

Classical and Quantum Fisher Information in the Geometrical Formulation of Quantum Mechanics [PDF]

open access: yes, 2010
The tomographic picture of quantum mechanics has brought the description of quantum states closer to that of classical probability and statistics. On the other hand, the geometrical formulation of quantum mechanics introduces a metric tensor and a ...
Aniello   +24 more
core   +2 more sources

Metric operators, generalized hermiticity and lattices of Hilbert lpaces [PDF]

open access: yes, 2014
A quasi-Hermitian operator is an operator that is similar to its adjoint in some sense, via a metric operator, i.e., a strictly positive self-adjoint operator.
Albeverio   +63 more
core   +1 more source

Joint power control and user grouping mechanism for efficient uplink non‐orthogonal multiple access‐based 5G communication: Utilising the Lèvy‐flight firefly algorithm

open access: yesIET Networks, EarlyView., 2023
We utilise a metaheuristic optimisation method, inspired by nature, called the Lévy‐flight firefly algorithm (LFA), to tackle the power regulation and user grouping in the NOMA systems. Abstract The non‐orthogonal multiple access strategies have shown promise to boost fifth generation and sixth generation wireless networks' spectral efficiency and ...
Zaid Albataineh   +4 more
wiley   +1 more source

Symmetry breaking via internal geometry

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2005
Gauge theories commonly employ complex vector-valued fields to reduce symmetry groups through the Higgs mechanism of spontaneous symmetry breaking.
Andrew Talmadge
doaj   +1 more source

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