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Given a geometrically irreducible smooth projective curve of genus 1 defined over the field of real numbers, and a pair of integers r and d, we determine the isomorphism class of the moduli space of semi-stable vector bundles of rank r and…

Algebraic Geometry · Mathematics 2016-06-22 Indranil Biswas , Florent Schaffhauser

We study moduli spaces of vector bundles on a two-dimensional neighbourhood $Z_k$ of an irreducible curve $\ell = CP^1$ with $\ell^2 = -k$ and give an explicit construction of these moduli as stratified spaces. We give sharp bounds for the…

Algebraic Geometry · Mathematics 2009-09-04 Edoardo Ballico , Elizabeth Gasparim , Thomas Köppe

Let X be a geometrically irreducible smooth projective curve over a field k. We describe the algebra of endomorphisms of indecomposable unstable vector bundles over X of rank 2 and degree d. Fixing some numerical invariants, namely the…

Algebraic Geometry · Mathematics 2011-03-01 L. Brambila-Paz , Osbaldo Mata , Nitin Nitsure

We analyze the local structure of the moduli space of semi-stable bundles on a curve. In particular, a complete description of the local structure is given in the rank 2 case. We obtain as a corollary of this analysis new results about the…

alg-geom · Mathematics 2008-02-03 Yves Laszlo

We desribe vector bundles over a class of noncommutative curves, namely, over noncommutative nodal curves of string type and of almost string type. We also prove that in other cases the classification of vector bundles over a noncommutative…

Algebraic Geometry · Mathematics 2015-01-27 Yuriy A. Drozd , Denys E. Voloshyn

Moduli of vector bundles on stacky curves behave similarly to moduli of vector bundles on curves, except there are additional numerical invariants giving many different notions of stability. We apply the existence criterion for good moduli…

Algebraic Geometry · Mathematics 2024-07-08 Chiara Damiolini , Victoria Hoskins , Svetlana Makarova , Lisanne Taams

We attempt to describe the rank 2 vector bundles on a curve C which are specializations of the trivial bundle. We get a complete classifications when C is Brill-Noether generic, or when it is hyperelliptic; in both cases all limit vector…

Algebraic Geometry · Mathematics 2023-06-22 Arnaud Beauville

We give a method to construct stable vector bundles whose rank divides the degree over curves of genus bigger than one. The method complements the one given by Newstead. Finally, we make some systematic remarks and observations in…

alg-geom · Mathematics 2008-02-03 Yi Hu , Wei-Ping Li

Let $X$ be a smooth geometrically connected projective curve of genus at least 2 over a field of characteristic zero. We compute the essential dimension of the moduli stack of symplectic bundles over $X$. Unlike the case of vector bundles,…

Algebraic Geometry · Mathematics 2024-12-13 Ajneet Dhillon , Sayantan Roy Chowdhury

We describe the moduli space of logarithmic rank 2 connections on elliptic curves with 2 poles.

Classical Analysis and ODEs · Mathematics 2020-12-18 Thiago Fassarella , Frank Loray

This paper presents the theory of holomorphic vector valued modular forms from a geometric perspective. More precisely, we define certain holomorphic vector bundles on the modular orbifold of generalized elliptic curves whose sections are…

Number Theory · Mathematics 2016-01-11 Luca Candelori , Cameron Franc

This is a continuation of "Rational families of vector bundles on curves, I". Let C be a smooth projective curve of genus at least 2 and let M be the moduli space of rank 2, stable vector bundles on C, with fixed determinant of degree 1.…

Algebraic Geometry · Mathematics 2007-05-23 Ana-Maria Castravet

A procedure for computing the dimensions of the moduli spaces of reducible, holomorphic vector bundles on elliptically fibered Calabi-Yau threefolds X is presented. This procedure is applied to poly-stable rank n+m bundles of the form V +…

High Energy Physics - Theory · Physics 2009-11-10 Yang-Hui He , Burt A. Ovrut , Rene Reinbacher

We give an asymptotic formula for the number of $\mathbb{F}_{q}$-rational points over a fixed determinant moduli space of stable vector bundles of rank $r$ and degree $d$ over a smooth, projective curve $X$ of genus $g \geq 2$ defined over…

Algebraic Geometry · Mathematics 2024-09-18 Arijit Dey , Sampa Dey , Anirban Mukhopadhyay

Let $C$ be a chain-like curve over $\mathbb{C}$. In this paper, we investigate the rationality of moduli spaces of $w$-semistable vector bundles on $C$ of arbitrary rank and fixed determinant by putting some restrictions on the Euler…

Algebraic Geometry · Mathematics 2022-06-07 Suhas B. N. , Praveen Kumar Roy , Amit Kumar Singh

In this paper, it is proved that certain stable rank-3 vector bundles can be written as extensions of line bundles and stable rank-2 bundles. As an application, we show the rationality of certain moduli spaces of stable rank-3 bundles over…

Algebraic Geometry · Mathematics 2009-09-25 Wei-ping Li , Zhenbo Qin

We give a complete classification of globally generated vector bundles of rank 3 on a smooth quadric threefold with $c_1\leq 2$ and extend the result to arbitrary higher rank case. We also investigate the existence of globally generated…

Algebraic Geometry · Mathematics 2012-12-14 Edoardo Ballico , Sukmoon Huh , Francesco Malaspina

A symplectic or orthogonal bundle $V$ of rank $2n$ over a curve has an invariant $t(V)$ which measures the maximal degree of its isotropic subbundles of rank $n$. This invariant $t$ defines stratifications on moduli spaces of symplectic and…

Algebraic Geometry · Mathematics 2012-04-05 Insong Choe , George H. Hitching

This paper gives various methods for constructing vector bundles over elliptic curves and more generally over families of elliptic curves. We construct universal families over generalized elliptic curves via spectral cover methods and also…

alg-geom · Mathematics 2008-02-03 Robert Friedman , John W. Morgan , Edward Witten

We consider the problem of constructing matrices of linear forms of constant rank by focusing on the associated vector bundles on projective spaces. Important examples are given by the classical Steiner bundles, as well as some special…

Algebraic Geometry · Mathematics 2023-04-18 Laurent Manivel , Rosa Miro-Roig
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