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Relative algebroids provide a framework that unifies Lie algebroids with partial differential equations. In this set of notes, we explain how relative algebroids arise from geometric problems, and give an introduction to their structural…

Differential Geometry · Mathematics 2025-10-28 Wilmer Smilde

We investigate the notion of real form of complex Lie superalgebras and supergroups, both in the standard and graded version. Our functorial approach allows most naturally to go from the superalgebra to the supergroup and retrieve the real…

Rings and Algebras · Mathematics 2023-03-21 Rita Fioresi , Fabio Gavarini

Developments in Carrollian gravity and holography necessitate the use of singular Carroll vector fields, a feature that cannot be accommodated within standard Carrollian geometry. We introduce Carrollian Lie algebroids as a framework to…

Differential Geometry · Mathematics 2026-02-11 Andrew James Bruce

We study realizations of Lie algebras by vector fields. A correspondence between classification of transitive local realizations and classification of subalgebras is generalized to the case of regular local realizations. A reasonable…

Mathematical Physics · Physics 2017-03-03 Daniel Gromada , Severin Pošta

In this paper, first using the higher derived brackets, we give the controlling algebra of relative difference Lie algebras, which are also called crossed homomorphisms or differential Lie algebras of weight 1 when the action is the adjoint…

Rings and Algebras · Mathematics 2022-10-24 Jun Jiang , Yunhe Sheng

We introduce singular subalgebroids of an integrable Lie algebroid, extending the notion of Lie subalgebroid by dropping the constant rank requirement. We lay the bases of a Lie theory for singular subalgebroids: we construct the associated…

Differential Geometry · Mathematics 2021-07-16 Marco Zambon , Iakovos Androulidakis

We investigate the finite-dimensional Lie groups whose points are separated by the continuous homomorphisms into groups of invertible elements of locally convex algebras with continuous inversion that satisfy an appropriate completeness…

Functional Analysis · Mathematics 2008-02-22 Daniel Beltita , Karl-Hermann Neeb

Stratified-algebraic vector bundles on real algebraic varieties have many desirable features of algebraic vector bundles but are more flexible. We give a characterization of the compact real algebraic varieties having the following…

Algebraic Geometry · Mathematics 2015-11-16 Wojciech Kucharz , Krzysztof Kurdyka

An arbitrary Leibniz algebra can be embedded in a differential graded Lie algebra via the derived bracket construction. Such an embedding is called a derived bracket representation. We will construct the universal version of the derived…

Quantum Algebra · Mathematics 2013-12-30 K. Uchino

Let $i:X\hookrightarrow Y$ be a closed embedding of smooth algebraic varieties. Denote by $N$ the normal bundle of $X$ in $Y$. We describe the construction of two Lie-type structures on the shifted bundle $N[-1]$ which encode the…

Algebraic Geometry · Mathematics 2014-07-01 Damien Calaque , Andrei Caldararu , Junwu Tu

A Q-algebroid is a Lie superalgebroid equipped with a compatible homological vector field and is the infinitesimal object corresponding to a Q-groupoid. We associate to every Q-algebroid a double complex. As a special case, we define the…

Differential Geometry · Mathematics 2020-03-30 Rajan Amit Mehta

The purpose of this paper is twofold. Firstly, to emphasise that the class of Lie algebras with chain lattices of ideals are elementary blocks in the embedding or decomposition of Lie algebras with finite lattice of ideals. Secondly, to…

Rings and Algebras · Mathematics 2023-07-11 Pilar Benito , Jorge Roldán-López

In this note, we examine the bundle picture of the pullback construction of Lie algebroids. The notion of submersions by Lie algebroids is introduced, which leads to a new proof of the local normal form for lie algebroid transversals of…

Symplectic Geometry · Mathematics 2019-02-20 Pedro Frejlich

The main goal is to classify 4-dimensional real Lie algebras $\g$ which admit a para-hypercomplex structure. This is a step toward the classification of Lie groups admitting the corresponding left-invariant structure and therefore…

Differential Geometry · Mathematics 2007-05-23 N. Blazic , S. Vukmirovic

We construct certain integral structures for the cores of reduced tame extended affine Lie algebras of rank at least 2. One of the main tools to achieve this is a generalization of Chevalley automorphisms in the context of extended affine…

Quantum Algebra · Mathematics 2021-06-22 Saeid Azam , Amir Farahmand Parsa , Mehdi Izadi Farhadi

This paper studies linear generalised complex structures over vector bundles, as a generalised geometry version of holomorphic vector bundles. In an adapted linear splitting, a linear generalised complex structure on a vector bundle $E\to…

Differential Geometry · Mathematics 2021-05-07 Malte Heuer , Madeleine Jotz Lean

Suppose we wish to embed an (associative) $k$-algebra $A$ in a $k$-algebra $R$ generated in some specified way; e.g., by two elements, or by copies of given $k$-algebras $A_1,$ $A_2,$ $A_3.$ Several authors have obtained sufficient…

Rings and Algebras · Mathematics 2020-11-04 George M. Bergman

We introduce a new concept of rank - relative rank associated to a filtered collection of polynomials. When the filtration is trivial our relative rank coincides with Schmidt rank (also called strength). We also introduce the notion of…

Commutative Algebra · Mathematics 2024-03-07 Amichai Lampert , Tamar Ziegler

In this note we construct an infinite-dimensional Lie group structure on the group of vertical bisections of a regular Lie groupoid. We then identify the Lie algebra of this group and discuss regularity properties (in the sense of Milnor)…

Group Theory · Mathematics 2019-12-05 Alexander Schmeding

We introduce the Courant algebroid lift, a new construction that takes a Courant algebroid together with a vector bundle connection and produces, when the connection is flat in the image of the anchor, a Courant algebroid. In general, this…

Differential Geometry · Mathematics 2025-11-10 Filip Moučka , Roberto Rubio