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We express any Courant algebroid bracket by means of a metric connection, and construct a Courant algebroid structure on any orthogonal Whitney sum $E\oplus C$ where E is a given Courant algebroid and C is a flat, pseudo- Euclidean vector…

Differential Geometry · Mathematics 2007-05-23 Izu Vaisman

We briefly review the description of the internal sector of supergravity theories in the language of generalised geometry and how this gives rise to a description of supersymmetric backgrounds as integrable geometric structures. We then…

High Energy Physics - Theory · Physics 2021-07-28 Charles Strickland-Constable

It is the aim of this paper to transfer to generalised geometry tools employed in the study of semi-Riemannian immersions, specializing at times to semi-Riemannian hypersurfaces. Given an exact Courant algebroid $E \to M$ and an immersion…

Differential Geometry · Mathematics 2025-07-17 Vicente Cortés , Oskar Schiller

We propose a definition of Poisson quasi-Nijenhuis Lie algebroids as a natural generalization of Poisson quasi-Nijenhuis manifolds and show that any such Lie algebroid has an associated quasi-Lie bialgebroid. Therefore, also an associated…

Differential Geometry · Mathematics 2008-06-17 Raquel Caseiro , Antonio De Nicola , Joana M. Nunes da Costa

Let $p$ be a Lie subalgebra of a semisimple Lie algebra $g$ and $(G,P)$ be the corresponding pair of connected Lie groups. A Cartan geometry of type $(G,P)$ associates to a smooth manifold $M$ a principal $P$-bundle and a Cartan connection,…

Mathematical Physics · Physics 2012-09-25 Stuart Armstrong , Rongmin Lu

We introduce a Poisson variety compatible with a cluster algebra structure and a compatible toric action on this variety. We study Poisson and topological properties of the union of generic orbits of this toric action. In particular, we…

Quantum Algebra · Mathematics 2007-05-23 M. Gekhtman , M. Shapiro , A. Vainshtein

The paper is devoted to peculiarities of the deformation quantization in the algebro-geometric context. A direct application of the formality theorem to an algebraic Poisson manifold gives a canonical sheaf of categories deforming coherent…

Algebraic Geometry · Mathematics 2008-11-26 M. Kontsevich

The covariant canonical formalism is a covariant extension of the traditional canonical formalism of fields. In contrast to the traditional canonical theory, it has a remarkable feature that canonical equations of gauge theories or gravity…

High Energy Physics - Theory · Physics 2017-03-21 Yasuhito Kaminaga

We formulate general definitions of semi-classical gauge transformations for noncommutative gauge theories in general backgrounds of string theory, and give novel explicit constructions using techniques based on symplectic embeddings of…

High Energy Physics - Theory · Physics 2022-01-12 Vladislav G. Kupriyanov , Richard J. Szabo

We construct the family of algebroid brackets $[\cdot,\cdot]_{c,v}$ on the tangent bundle $T^*M$ to a Poisson manifold $(M,\pi)$ starting from an algebroid bracket of differential forms. We use these brackets to generate Poisson structures…

Mathematical Physics · Physics 2018-06-22 Alina Dobrogowska , Grzegorz Jakimowicz , Karolina Wojciechowicz

Extending our reduction construction in \cite{Hu} to the Hamiltonian action of a Poisson Lie group, we show that generalized K\"ahler reduction exists even when only one generalized complex structure in the pair is preserved by the group…

Differential Geometry · Mathematics 2007-05-23 Shengda Hu

We classify in this paper Poisson structures on modules over semisimple Lie algebras arising from classical r-matrices. We then study their quantizations and the relation to classical invariant theory.

Quantum Algebra · Mathematics 2007-06-05 Sebastian Zwicknagl

We extend to the context of Courant algebroids several hierarchies that can be constructed on Poisson-Nijenhuis manifolds. More precisely, we introduce several notions (Poisson-Nijenhuis, deformation-Nijenhuis and Nijenhuis pairs) that…

Differential Geometry · Mathematics 2012-01-17 Paulo Antunes , Camille Laurent-Gengoux , Joana M. Nunes da Costa

We define the notion of Y-algebroids, generalising the Lie, Courant, and exceptional algebroids that have been used to capture the local symmetry structure of type II string theory and M-theory compactifications to $D \geq 5$ dimensions.…

High Energy Physics - Theory · Physics 2024-12-02 Ondrej Hulik , Emanuel Malek , Fridrich Valach , Daniel Waldram

In this paper we define a Poisson structure on some moduli spaces related to principal G-bundles on elliptic curves, the simplest example being the moduli space of stable pairs: a vector bundle and its global section. We also study…

alg-geom · Mathematics 2007-05-23 Alexander Polishchuk

This article shows that the approach to generalised curvature and torsion pioneered by Polacek and Siegel [1] is a generalisation of Cartan Geometry -- rendering latter natural from the point of view of O(d,d)-generalised geometry. We…

High Energy Physics - Theory · Physics 2024-09-19 Falk Hassler , Ondrej Hulik , David Osten

We suggest a geometric approach to quantisation of the twisted Poisson structure underlying the dynamics of charged particles in fields of generic smooth distributions of magnetic charge, and dually of closed strings in locally…

High Energy Physics - Theory · Physics 2019-03-27 Severin Bunk , Lukas Müller , Richard J. Szabo

In this contribution we review some of the interplay between sigma models in theoretical physics and novel geometrical structures such as Lie (n-)algebroids. The first part of the article contains the mathematical background, the definition…

High Energy Physics - Theory · Physics 2010-04-06 A. Kotov , T. Strobl

We construct a generalization of Courant algebroids which are classified by the third cohomology group $H^3(A,V)$, where $A$ is a Lie Algebroid, and $V$ is an $A$-module. We see that both Courant algebroids and $\mathcal{E}^1(M)$ structures…

Differential Geometry · Mathematics 2019-08-15 David Li-Bland

We introduce Hopf algebroid covariance on Woronowicz's differential calculus. Using it, we develop quite a general framework of noncommutative complex geometry that subsumes the one in [2]. We present transverse complex and K\"ahler…

Quantum Algebra · Mathematics 2021-05-11 Suvrajit Bhattacharjee , Indranil Biswas , Debashish Goswami
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