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We describe the integral equivariant cohomology ring of a weighted projective space in terms of piecewise polynomials, and thence by generators and relations. We deduce that the ring is a perfect invariant, and prove a Chern class formula…

Algebraic Topology · Mathematics 2009-04-15 Anthony Bahri , Matthias Franz , Nigel Ray

We present equivalences between certain categories of vector bundles on projective varieties, namely cokernel bundles, Steiner bundles, syzygy bundles, and monads, and full subcategories of representations of certain quivers. As an…

Algebraic Geometry · Mathematics 2016-07-05 Marcos Jardim , Daniela M. Prata

Given a smooth action of a Lie group on a manifold, we give two constructions of the Chern character of an equivariant vector bundle in the cyclic cohomology of the crossed product algebra. The first construction associates a cycle to the…

Differential Geometry · Mathematics 2023-04-10 Bjarne Kosmeijer , Hessel Posthuma

Given integers $a_1,a_2,a_3$, there is a complex rank $3$ topological bundle on $\mathbb CP^5$ with $i$-th Chern class equal to $a_i$ if and only if $a_1,a_2,a_3$ satisfy the Schwarzenberger condition. Provided that the Schwarzenberger…

Algebraic Topology · Mathematics 2024-08-02 Morgan Opie

We introduce a new construction, the isotropy groupoid, to organize the orbit data for split $\Gamma$-spaces. We show that equivariant principal $G$-bundles over split $\Gamma$-CW complexes $X$ can be effectively classified by means of…

Geometric Topology · Mathematics 2013-02-12 Ian Hambleton , Jean-Claude Hausmann

Extending a previous result of the authors, we classify globally generated vector bundles on projective spaces with first Chern class equal to three.

Algebraic Geometry · Mathematics 2013-07-30 José Carlos Sierra , Luca Ugaglia

We enumerate complex rank $n$ topological vector bundles on $\mathbb CP^{n+1}$ with prescribed Chern classes. This extends work of Atiyah and Rees in the case $n=2$ and work of Hu in the case that all Chern classes are zero.

Algebraic Topology · Mathematics 2026-03-03 Morgan P. Opie

We show in this article that if a holomorphic vector bundle has a nonnegative Hermitian metric in the sense of Bott and Chern, which always exists on globally generated holomorphic vector bundles, then some special linear combinations of…

Differential Geometry · Mathematics 2020-03-05 Ping Li

We give a complete answer to the question of (semi)stability of tangent bundle of any nonsingular projective complex toric variety with Picard number 2 by using combinatorial crietrion of (semi)stability of an equivariant sheaf. We also…

Algebraic Geometry · Mathematics 2019-10-31 Jyoti Dasgupta , Arijit Dey , Bivas Khan

We introduce a notion of equivariant vector bundles on schemes over semirings. We do this by considering the functor of points of a locally free sheaf. We prove that every toric vector bundle on a toric scheme $X$ over an idempotent…

Algebraic Geometry · Mathematics 2025-07-30 Jaiung Jun , Kalina Mincheva , Jeffrey Tolliver

Let X be a geometrically connected smooth projective curve of genus one, defined over the field of real numbers, such that X does not have any real points. We classify the isomorphism classes of all stable real algebraic vector bundles over…

Algebraic Geometry · Mathematics 2007-06-01 Usha N. Bhosle , Indranil Biswas

In this paper we study the category of standard holomorphic vector bundles on a noncommutative two-torus. We construct a functor from the derived category of such bundles to the derived category of coherent sheaves on an elliptic curve and…

Quantum Algebra · Mathematics 2009-11-07 Alexander Polishchuk , Albert Schwarz

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

Let $X$ be a differentiable manifold endowed with a transitive action $\alpha:A\times X\longrightarrow X$ of a Lie group $A$. Let $K$ be a Lie group. Under suitable technical assumptions, we give explicit classification theorems, in terms…

Differential Geometry · Mathematics 2013-11-19 Indranil Biswas , Andrei Teleman

In this paper, we study cohomology groups of vector bundles on neighborhoods of a non-pluriharmonic locus in Stein manifolds and in projective manifolds. By using our results, we show variants of the Lefschetz hyperplane theorem.

Complex Variables · Mathematics 2020-02-18 Yusaku Tiba

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

This paper introduces $\infty$- and $n$-fold vector bundles as special functors from the $\infty$- and $n$-cube categories to the category of smooth manifolds. We study the cores and "n-pullbacks" of $n$-fold vector bundles and we prove…

Differential Geometry · Mathematics 2018-09-06 Malte Heuer , Madeleine Jotz Lean

I repeat my definition for quantization of a vector bundle. For the case of Toeplitz and geometric quantization of a compact Kaehler Manifold, I give a construction for quantizing any smooth vector bundle which depends functorially on a…

Quantum Algebra · Mathematics 2009-10-31 Eli Hawkins

The cohomology of the Hilbert schemes of points on smooth projective surfaces can be approached both with vertex algebra tools and equivariant tools. Using the first tool, we study the existence and the structure of universal formulas for…

Algebraic Geometry · Mathematics 2007-05-23 Samuel Boissiere

We give a combinatorial classification of torus equivariant vector bundles on a (normal) projective T-variety of complexity-one. This extends the classification of equivariant line bundles on complexity-one T-varieties by Petersen-S\"uss on…

Algebraic Geometry · Mathematics 2024-06-06 Jyoti Dasgupta , Chandranandan Gangopadhyay , Kiumars Kaveh , Christopher Manon