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We give a survey on projective ring lines and some of their substructures which in turn are more general than a projective line over a ring.

Algebraic Geometry · Mathematics 2024-02-13 Hans Havlicek

Let $G$ be a finite abelian group acting faithfully on ${\mathbb C}{\mathbb P}^1$ via holomorphic automorphisms. In \cite{DF2} the $G$--equivariant algebraic vector bundles on $G$--invariant affine open subsets of ${\mathbb C}{\mathbb P}^1$…

Algebraic Geometry · Mathematics 2024-06-07 Indranil Biswas , Francois-Xavier Machu

We give a proof of the existence of radial (smooth) parallel sections of vector bundles endowed with a linear connection.

Differential Geometry · Mathematics 2018-01-23 Antonio J. Di Scala

In this paper, we attempt to determine the quantum cohomology of projective bundles over the projective space P^n. In contrast to the previous examples, the relevant moduli spaces in our case frequently do not have expected dimensions. It…

Algebraic Geometry · Mathematics 2008-02-03 Zhenbo Qin , Yongbin Ruan

In this book, we establish a theory of adelic line bundles over quasi-projective varieties over finitely generated fields. Besides definitions of adelic line bundles, we consider their intersection theory, volume theory, and height theory,…

Number Theory · Mathematics 2025-06-17 Xinyi Yuan , Shou-Wu Zhang

We study VB-groupoids and VB-algebroids, which are vector bundles in the realm of Lie groupoids and Lie algebroids. Through a suitable reformulation of their definitions, we elucidate the Lie theory relating these objects, i.e., their…

Differential Geometry · Mathematics 2016-01-26 Henrique Bursztyn , Alejandro Cabrera , Matias del Hoyo

In previous papers it was shown that the left and right O-module structure of the jet bundles on the projective line differed. In this paper we show that similar statements hold for jet bundles on projective space in any dimension. We also…

Algebraic Geometry · Mathematics 2020-11-13 Helge Øystein Maakestad

The quantization of vector bundles is defined. Examples are constructed for the well controlled case of equivariant vector bundles over compact coadjoint orbits. (Coadjoint orbits are symplectic spaces with a transitive, semisimple symmetry…

q-alg · Mathematics 2009-10-30 Eli Hawkins

We systematically study the splitting of vector bundles on a smooth, projective variety, whose restriction to the zero locus of a regular section of an ample vector bundle splits. First, we find ampleness and genericity conditions which…

Algebraic Geometry · Mathematics 2015-09-21 Mihai Halic

We show that the category of affine bundles over a smooth manifold M is equivalent to the category of affine spaces modelled on projective finitely generated C^\infty(M)-modules. Using this equivalence of categories, we are able to give an…

Differential Geometry · Mathematics 2012-01-30 Thomas Leuther

In this paper, we study how certain vector bundles on an elliptic surface are changed under logarithmic transformations.

Algebraic Geometry · Mathematics 2022-04-20 Ludmil Katzarkov , Kyoung-Seog Lee

We introduce a notion of tropical vector bundle on a tropical toric variety which is a tropical analogue of a torus equivariant vector bundle on a toric variety. Alternatively it can be called a toric matroid bundle. We define equivariant…

Algebraic Geometry · Mathematics 2024-08-15 Kiumars Kaveh , Christopher Manon

We show that Horrock's criterion for the splitting of vector bundles on $\PP^n$ can be extended to vector bundles on multiprojective spaces and to smooth projective varieties with the weak CM property (see Definition 3.11). As a main tool…

Algebraic Geometry · Mathematics 2007-05-23 L. Costa , R. M. Miró-Roig

We generalise the variant of the Babylonian tower theorem for vector bundles on projective spaces proved by I. Coanda and G. Trautmann (2006) to the case of principal $G$-bundles over projective spaces, where $G$ is a linear algebraic group…

Algebraic Geometry · Mathematics 2009-06-09 I. Biswas , I. Coanda , G. Trautmann

This paper gives a new elementary proof of the theorem that all vector bundles on $\mathbb P^1$ split into the direct sum of line bundles. The proof is based on the study of divisors associated to germs of sections at the generic point.

Algebraic Geometry · Mathematics 2011-11-08 William F. Sawin

In this note, we give a brief exposition on the differences and similarities between strictly nef and ample vector bundles, with particular focus on the circle of problems surrounding the geometry of projective manifolds with strictly nef…

Algebraic Geometry · Mathematics 2020-09-03 Jie Liu , Wenhao Ou , Xiaokui Yang

It is interesting to know, how far we can generalize the notion of a group-valued cocycle keeping the property to determine a bundle. We find a generalization for pairs of cocycles and show how these generalized pairs of cocycles can still…

K-Theory and Homology · Mathematics 2013-12-03 Vladimir Manuilov , Chao You

We discuss the projectivity of the moduli space of semistable vector bundles on a curve of genus $g\geq 2$. This is a classical result from the 1960s, obtained using geometric invariant theory. We outline a modern approach that combines the…

Algebraic Geometry · Mathematics 2023-05-01 Jarod Alper , Pieter Belmans , Daniel Bragg , Jason Liang , Tuomas Tajakka

We define functorial isomorphisms of parallel transport along etale paths for a class of vector bundles on a p-adic curve. All bundles of degree zero whose reduction is strongly semistable belong to this class. In particular, they give rise…

Algebraic Geometry · Mathematics 2007-05-23 Christopher Deninger , Annette Werner

By means of techniques from the Morita equivalence theory, we get finitely generated and projective modules over the quantum Heisenberg manifolds. This enables us to get some information about the range of the trace of these algebras, at…

funct-an · Mathematics 2008-02-03 Beatriz Abadie