Results 21 to 30 of about 4,276,702 (282)

Ricci Curvature Inequalities for Skew CR-Warped Product Submanifolds in Complex Space Forms

open access: yesMathematics, 2020
The fundamental goal of this study was to achieve the Ricci curvature inequalities for a skew CR-warped product (SCR W-P) submanifold isometrically immersed in a complex space form (CSF) in the expressions of the squared norm of mean curvature vector and
Meraj Ali Khan, Ibrahim Aldayel
doaj   +1 more source

Characterization of Lagrangian Submanifolds by Geometric Inequalities in Complex Space Forms

open access: yesAdvances in Mathematical Physics, 2021
In this paper, we give an estimate of the first eigenvalue of the Laplace operator on a Lagrangian submanifold Mn minimally immersed in a complex space form.
Lamia Saeed Alqahtani
doaj   +1 more source

Sequential Design-Space Reduction and Its Application to Hull-Form Optimization

open access: yesJournal of Marine Science and Engineering, 2023
Hull-form optimization is a complex engineering problem. Owing to the several numerical simulations and complex design-performance spaces, hull-form optimization is considered an inefficient process, which makes determining the global optimum difficult ...
Zu-Yuan Liu   +4 more
doaj   +1 more source

Chen-Ricci Inequalities with a Quarter Symmetric Connection in Generalized Space Forms

open access: yesAdvances in Mathematical Physics, 2021
In this article, we obtain improved Chen-Ricci inequalities for submanifolds of generalized space forms with quarter-symmetric metric connection, with the help of which we completely characterized the Lagrangian submanifold in generalized complex space ...
Ali H. Al-Khaldi   +3 more
doaj   +1 more source

About nonlinear theory of two-cavity klystron with a drift space in the form of medium with complex permittivity [PDF]

open access: yesИзвестия высших учебных заведений: Прикладная нелинейная динамика, 2020
The purpose of this work is to construct an approximate nonlinear theory of a klystron amplifier in which a medium with complex conductivity or with metamaterials with negative permittivity is located between the input and output cavities instead of the ...
Funtov, Aleksandr Andreevich
doaj   +1 more source

Kahler submanifolds and the Umehara algebra [PDF]

open access: yes, 2016
We show that an indefinite Euclidean complex space is not a relative of an indefinite non-flat complex space form.
Cheng, Xiaoliang   +2 more
core   +2 more sources

Generalized coordinates on the phase space of Yang-Mills theory [PDF]

open access: yes, 1994
We study the suitability of complex Wilson loop variables as (generalized) coordinates on the physical phase space of $SU(2)$-Yang-Mills theory. To this end, we construct a natural one-to-one map from the physical phase space of the Yang-Mills theory ...
Ashtekar A   +9 more
core   +3 more sources

Calculus on symplectic manifolds [PDF]

open access: yes, 2008
On a symplectic manifold, there is a natural elliptic complex replacing the de Rham complex. It can be coupled to a vector bundle with connection and, when the curvature of this connection is constrained to be a multiple of the symplectic form, we find a
Eastwood, Michael, Slovak, Jan
core   +6 more sources

Complex Hypersurfaces in an Indefinite Complex Space Form

open access: yesTokyo Journal of Mathematics, 1987
Let M be a complex hypersurface of index 2s in an \((n+1)\)-dimensional indefinite complex space form of constant holomorphic sectional curvature c(\(\neq 0)\) and of index \(2(s+a),\) where \(a=0\) or 1. The authors prove that M is Einstein if M satisfies \(R(X,Y)\cdot S=0\) where R and S denote the curvature tensor and the Ricci tensor, respectively.
AIYAMA, Reiko   +3 more
openaire   +2 more sources

The partition bundle of type A_{N-1} (2, 0) theory [PDF]

open access: yes, 2006
Six-dimensional (2, 0) theory can be defined on a large class of six-manifolds endowed with some additional topological and geometric data (i.e. an orientation, a spin structure, a conformal structure, and an R-symmetry bundle with connection).
Andouze-Bernard, Séverine   +2 more
core   +2 more sources

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