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On a given manifold M, the Nijenhuis bracket makes the superspace of vector-valued differential forms into a Lie superalgebra that can be interpreted as the centralizer of the exterior differential considered as a vector field on the…

Representation Theory · Mathematics 2015-06-26 Pavel Grozman , Dimitry Leites

We study infinitesimal deformations of autodual and hyper-holomorphic connections on complex vector bundles on hyper-K\"ahler manifolds of arbitrary dimension. In particular, we describe the DG Lie algebra controlling this deformation…

Algebraic Geometry · Mathematics 2022-07-27 Francesco Meazzini , Claudio Onorati

By proving an integral formula of the curvature tensor of $E\ts \det E$, we observe that the curvature tensor of $E\ts \det E$ is very similar to that of a line bundle and obtain certain new Kodaira-Akizuki-Nakano type vanishing theorems…

Algebraic Geometry · Mathematics 2015-07-23 Kefeng Liu , Xiaokui Yang

We classify equivariant topological complex vector bundles over real projective plane under a compact Lie group (not necessarily effective) action. It is shown that nonequivariant Chern classes and isotropy representations at (at most)…

Group Theory · Mathematics 2011-03-15 Min Kyu Kim

We develop a theory of arithmetic characteristic classes of (fully decomposed) automorphic vector bundles equipped with an invariant hermitian metric. These characteristic classes have values in an arithmetic Chow ring constructed by means…

Algebraic Geometry · Mathematics 2007-05-23 J. I. Burgos Gil , J. Kramer , U. Kuehn

Let $\mathfrak{d}$ be the Lie superalgebra of superderivations of the sheaf of sections of the exterior algebra of the homogeneous vector bundle $E$ over the flag variety $G/P$, where $G$ is a simple finite-dimensional complex Lie group and…

Representation Theory · Mathematics 2023-06-22 Arkady Onishchik

Let X be a smooth complex projective curve of genus g bigger or equal to 1. If g is bigger than 1 assume further that X is either bielliptic or with general moduli. Under a natural condition on slopes, we prove that there exists a short…

Algebraic Geometry · Mathematics 2007-05-23 E. Ballico , B. Russo

v2: A few typos corrected, a few formulations improved. On $X$ projective smooth over an algebraically closed field of characteristic $p>0$, we show that irreducible stratified bundles have rank 1 if and only if the commutator $[\pi_1^{{\rm…

Algebraic Geometry · Mathematics 2011-08-09 Hélène Esnault , Xiaotao Sun

We introduce a diagram category, study its structure, and investigate some of its applications to the representation theory of Lie algebras and Lie superalgebras. The morphisms of the category, which contains a subcategory isomorphic to the…

Representation Theory · Mathematics 2023-04-21 G. I. Lehrer , R. B. Zhang

Let X be an irreducible smooth complex projective curve of genus g at least 4. Let M(r,\Lambda) be the moduli space of stable vector bundles over X or rank r and fixed determinant \Lambda, of degree d. We give a new proof of the fact that…

Algebraic Geometry · Mathematics 2012-02-15 Indranil Biswas , Tomas L. Gomez , V. Munoz

A tangent category is a category equipped with an endofunctor that satisfies certain axioms which capture the abstract properties of the tangent bundle functor from classical differential geometry. Cockett and Cruttwell introduced…

Category Theory · Mathematics 2020-09-09 Benjamin MacAdam

Perhaps the most important contribution of gauge theory to general mathematics is to point out the importance of association functors. Emphasizing category theory we characterize association functors by two of their natural properties and…

Differential Geometry · Mathematics 2022-07-29 Gustavo Amilcar Saldaña Moncada , Gregor Weingart

We extend the well-known formula for the Euler class of a real oriented even-dimensional vector bundle in terms of the curvature of a metric connection to the case of a general linear connection provided a metric is present. We rewrite the…

Differential Geometry · Mathematics 2021-06-29 Brian Klatt

We show that an equivariant vector bundle on a complete toric variety is nef or ample if and only if its restriction to every invariant curve is nef or ample, respectively. Furthermore, we show that nef toric vector bundles have a…

Algebraic Geometry · Mathematics 2010-07-09 Milena Hering , Mircea Mustata , Sam Payne

A Lie algebra structure on variation vector fields along an immersed curve in a $2$-dimensional real space form is investigated. This Lie algebra particularized to plane curves is the cornerstone in order to define a Hamiltonian structure…

Differential Geometry · Mathematics 2015-06-19 José del Amor , Ángel Giménez , Pascual Lucas

We introduce the concept of a higher algebroid, generalizing the notions of an algebroid and a higher tangent bundle. Our ideas are based on a description of (Lie) algebroids as vector bundle comorphisms - differential relations of a…

Differential Geometry · Mathematics 2019-01-01 Michał Jóźwikowski , Mikołaj Rotkiewicz

In this short paper, we give two proofs that the Euler characteristic is multiplicative, for fiber sequences of finitely dominated spaces. This is equivalent to proving that the Becker-Gottlieb transfer is functorial on $\pi_0$.

Algebraic Topology · Mathematics 2023-03-29 John R. Klein , Cary Malkiewich , Maxime Ramzi

Infinitesimal symmetries of $S^1$-bundle gerbes are modelled with multiplicative vector fields on Lie groupoids. It is shown that a connective structure on a bundle gerbe gives rise to a natural horizontal lift of multiplicative vector…

Differential Geometry · Mathematics 2022-08-09 Derek Krepski , Jennifer Vaughan

We introduce the notion of a Lie semiheap as a smooth manifold equipped with a para-associative ternary product. For a particular class of Lie semiheaps we establish the existence of left-invariant vector fields. Furthermore, we show how…

Differential Geometry · Mathematics 2024-05-01 Andrew James Bruce

The construction of double point cobordism groups of vector bundles on varieties in the work [Lee-P] (arXiv:1002.1500 [math.AG]) of Yuan-Pin Lee and Rahul Pandharipande gives immediately double point cobordism groups of filtered vector…

Algebraic Geometry · Mathematics 2011-04-05 Chien-Hao Liu , Yu-jong Tzeng , Shing-Tung Yau