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In the holomorphic or algebraic setting we consider a vector bundle E on a smooth subvariety X in a smooth variety Y over a field of characteristic zero. Assuming E extends to the l-th neighborhood of X in Y, we study cohomological…

Algebraic Geometry · Mathematics 2022-10-04 Vladimir Baranovsky , Hongseok Chang

Given a compact K\"ahler manifold, Geometric Invariant Theory is applied to construct analytic GIT-quotients that are local models for a classifying space of (poly)stable holomorphic vector bundles containing the coarse moduli space of…

Complex Variables · Mathematics 2021-04-07 Nicholas Buchdahl , Georg Schumacher

We examine the topological characteristic cohomology classes of complexified vector bundles. In particular, all the classes coming from the real vector bundles underlying the complexification are determined.

K-Theory and Homology · Mathematics 2013-12-24 Alexander D. Rahm

We study flat vector bundles over complex parallelizable manifolds.

Algebraic Geometry · Mathematics 2009-09-25 Jörg Winkelmann

In this paper we study numerical properties of quotients of holomorphic log-tensors.

Algebraic Geometry · Mathematics 2019-02-20 Frédéric Campana , Mihai Paun

A family of holomorphic vector bundles is constructed on a complex manifold $X$. The space of the holomorphic sections of these bundles are calculated in certain cases. As an application, if $X$ is an $N$-dimensional compact K\"ahler…

Differential Geometry · Mathematics 2020-10-22 Bailin Song

We classify the total spaces of bundles over the four sphere with fiber a three sphere up to orientation preserving and reversing homotopy equivalence, homeomorphism and diffeomorphism. These total spaces have been of interest to both…

Algebraic Topology · Mathematics 2007-05-23 Diarmuid Crowley , Christine M. Escher

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

We prove that the cyclic homology of a scheme with an ample line bundle coincides with the cyclic homology of its category of algebraic vector bundles. As a byproduct of the proof, we obtain a new construction of the Chern character of a…

K-Theory and Homology · Mathematics 2007-05-23 Bernhard Keller

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

We show, e.g., that a holomorphic Banach vector bundle over a pseudoconvex open subset of, say, Hilbert space is holomorphically trivial if it is continuously trivial. Some applications are also given.

Complex Variables · Mathematics 2007-05-23 Imre Patyi

The notion of Gelfand pair (G, K) can be generalized if we consider homogeneous vector bundles over G/K instead of the homogeneous space G/K and matrix-valued functions instead of scalar-valued functions. This gives the definition of…

Representation Theory · Mathematics 2020-03-04 Rocío Díaz Martín , Linda Saal

In this paper we survey results on the existence of holomorphic embeddings and immersions of Stein manifolds into complex manifolds. Most results pertain to proper maps into Stein manifolds. We include a new result saying that every…

Complex Variables · Mathematics 2018-10-03 Franc Forstneric

We survey some recent progress in the theory of vector bundles on algebraic varieties and related questions in algebraic K-theory.

Algebraic Geometry · Mathematics 2021-11-08 Aravind Asok , Jean Fasel

In [arXiv:2008.04625] the authors constructed a classifying space for polystable holomorphic vector bundles on a compact K\"ahler manifold using analytic GIT theory. The aim of this article is to show that this classifying space taken in…

Algebraic Geometry · Mathematics 2022-03-02 Nicholas Buchdahl , Georg Schumacher

In a previous work, the authors introduced the notion of `coherent tangent bundle', which is useful for giving a treatment of singularities of smooth maps without ambient spaces. Two different types of Gauss-Bonnet formulas on coherent…

Differential Geometry · Mathematics 2015-07-10 Kentaro Saji , Masaaki Umehara , Kotaro Yamada

In this article, we prove that if $\Pi: X\to \Omega$ is a surjective holomorphic map, with $\Omega$ a Stein space and $X$ a complex manifold of dimension $n\geq 3,$ and if, for every $x\in \Omega$ there exists an open neighborhood $U$ such…

Complex Variables · Mathematics 2007-05-23 Youssef Alaoui

In this article we announce some results on compactifying moduli spaces of rank-2 vector bundles on surfaces by spaces of vector bundles on trees of surfaces. This is thought as an algebraic counterpart of the so called bubbling of vector…

Algebraic Geometry · Mathematics 2011-11-01 D. Markushevich , A. S. Tikhomirov , G. Trautmann

A rigorous mathematical proof is given of a class of vector identities that provide a way to separate an arbitrary vector field (over a linear space) into the sum of a radial (i.e., pointing toward the radial unit vector) vector field,…

Classical Physics · Physics 2007-05-23 M. Bornatici , O. Maj

We show that if M is a surface bundle over S^1 with fiber of genus 2, then for any integer n, M has a finite cover tilde(M) with b_1(tilde(M)) > n. A corollary is that M can be geometrized using only the `non-fiber' case of Thurston's…

Geometric Topology · Mathematics 2014-11-11 Joseph D Masters