Results 21 to 30 of about 762 (171)

Generalised Complex Geometry in Thermodynamical Fluctuation Theory

open access: yesEntropy, 2015
We present a brief overview of some key concepts in the theory of generalized complex manifolds. This new geometry interpolates, so to speak, between symplectic geometry and complex geometry.
P. Fernández de Córdoba, J. M. Isidro
doaj   +1 more source

Feature Extraction of Gearbox Early Fault based on ISGMD and MED

open access: yesJixie chuandong, 2022
Aiming at the difficulty in identifying early faults and compound faults of gearboxes under strong noise background,a method of extracting fault features based on the combination of improved symplectic geometry mode decomposition (ISGMD) and minimum ...
Shuzhou Dong, Xunpeng Qin, Shiming Yang
doaj  

Lagrangian Submanifolds of Symplectic Structures Induced by Divergence Functions

open access: yesEntropy, 2020
Divergence functions play a relevant role in Information Geometry as they allow for the introduction of a Riemannian metric and a dual connection structure on a finite dimensional manifold of probability distributions.
Marco Favretti
doaj   +1 more source

Gerbes in Geometry, Field Theory, and Quantisation

open access: yesComplex Manifolds, 2021
This is a mostly self-contained survey article about bundle gerbes and some of their recent applications in geometry, field theory, and quantisation.
Bunk Severin
doaj   +1 more source

Conformally symplectic structures and the Lefschetz condition

open access: yesComptes Rendus. Mathématique
This short note provides a symplectic analogue of Vaisman’s theorem in complex geometry. Namely, for any compact symplectic manifold satisfying the hard Lefschetz condition in degree 1, every locally conformally symplectic structure is in fact globally ...
Lejmi, Mehdi, Wilson, Scott O.
doaj   +1 more source

Extended Riemannian geometry II: local heterotic double field theory

open access: yesJournal of High Energy Physics, 2018
We continue our exploration of local Double Field Theory (DFT) in terms of symplectic graded manifolds carrying compatible derivations and study the case of heterotic DFT.
Andreas Deser   +2 more
doaj   +1 more source

On the hyperbolic symplectic geometry

open access: yesJournal of Combinatorial Theory, Series A, 2004
The present article provides a new characterization of the geometry on the points and hyperbolic lines of a non-degenerate symplectic polar space. This characterization is accomplished by studying the family of subspaces obtained when considering the polars of all hyperbolic lines. Let \(\mathbb W_{2n-1}(\mathbb F)\) denote the polar space with respect
openaire   +2 more sources

Symplectic Applicability of Lagrangian Surfaces

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2009
We develop an approach to affine symplectic invariant geometry of Lagrangian surfaces by the method of moving frames. The fundamental invariants of elliptic Lagrangian immersions in affine symplectic four-space are derived together with their ...
Lorenzo Nicolodi, Emilio Musso
doaj   +1 more source

Geometric Quantization and Epistemically Restricted Theories: The Continuous Case [PDF]

open access: yesElectronic Proceedings in Theoretical Computer Science, 2017
It is possible to reproduce the quantum features of quantum states, starting from a classical statistical theory and then limiting the amount of knowledge that an agent can have about an individual system [5, 18].These are so called epistemic ...
Ivan Contreras, Ali Nabi Duman
doaj   +1 more source

Symplectic Toric Geometry and the Regular Dodecahedron

open access: yesJournal of Mathematics, 2015
The regular dodecahedron is the only simple polytope among the platonic solids which is not rational. Therefore, it corresponds neither to a symplectic toric manifold nor to a symplectic toric orbifold.
Elisa Prato
doaj   +1 more source

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