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We classify nef vector bundles on a smooth hyperquadric of dimension $\geq 4$ with first Chern class two over an algebraically closed field of characteristic zero.

Algebraic Geometry · Mathematics 2023-12-18 Masahiro Ohno

We classify nef vector bundles on a smooth hyperquadric of dimension three with first Chern class two over an algebraically closed field of characteristic zero. In particular, we see that they are globally generated.

Algebraic Geometry · Mathematics 2025-06-25 Masahiro Ohno

We classify nef vector bundles on a smooth quadric surface with first Chern class $(2,2)$ over an algebraically closed field of characteristic zero.

Algebraic Geometry · Mathematics 2023-11-07 Masahiro Ohno

We describe nef vector bundles on a projective space with first Chern class three and second Chern class eight over an algebraically closed field of characteristic zero by giving them a minimal resolution in terms of a full strong…

Algebraic Geometry · Mathematics 2017-08-03 Masahiro Ohno

We classify nef vector bundles on a projective space with first Chern class three over an algebraically closed field of characteristic zero; we see, in particular, that these nef vector bundles are globally generated if the second Chern…

Algebraic Geometry · Mathematics 2018-08-14 Masahiro Ohno

We show that the tangent bundle of a projective manifold with nef anticanonical class is generically nef. That is, its restriction to a curve cut out by general sufficiently ample divisors is a nef vector bundle. This confirms a conjecture…

Algebraic Geometry · Mathematics 2021-08-03 Wenhao Ou

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

This article is concerned with Chern class and Chern number inequalities on polarized manifolds and nef vector bundles. For a polarized pair $(M,L)$ with $L$ very ample, our first main result is a family of sharp Chern class inequalities.…

Differential Geometry · Mathematics 2022-05-11 Ping Li , Fangyang Zheng

We study the cohomological classification of vector bundles on smooth real affine surfaces and threefolds. We show that, as was observed in joint work in A. Asok and J. Fasel and in a coming joint paper with S. Banerjee and J. Fasel, under…

Algebraic Geometry · Mathematics 2026-05-22 Samuel Lerbet

In this paper, we show that if the tangent bundle of a smooth projective variety is strictly nef, then it is isomorphic to a projective space; if a projective variety $X^n$ $(n>4)$ has strictly nef $\Lambda^2 TX$, then it is isomorphic to…

Algebraic Geometry · Mathematics 2018-01-31 Duo Li , Xiaokui Yang

A formula for the first Chern class of the Verlinde bundle over the moduli space of smooth genus g curves is given. A finite-dimensional argument is presented in rank 2 using geometric symmetries obtained from strange duality, relative…

Algebraic Geometry · Mathematics 2016-10-04 Alina Marian , Dragos Oprea , Rahul Pandharipande

For any (n-1)-dimensional simplicial complex, we construct a particular n-dimensional complex vector bundle over the associated Davis-Januszkiewicz space whose Chern classes are given by the elementary symmetric polynomials in the…

Algebraic Topology · Mathematics 2009-05-28 Dietrich Notbohm

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

The classification of algebraic vector bundles of rank 2 over smooth affine fourfolds is a notoriously difficult problem. Isomorphism classes of such vector bundles are not uniquely determined by their Chern classes, in contrast to the…

Algebraic Geometry · Mathematics 2025-07-29 Thomas Brazelton , Morgan Opie , Tariq Syed

We classify globally generated vector bundles on the projective n-space with first Chern class = 4. This extends previous results for first Chern class at most 3, namely for 2 of Sierra and Ugaglia [J. Pure Appl. Algebra 213 (2009),…

Algebraic Geometry · Mathematics 2016-04-26 Cristian Anghel , Iustin Coanda , Nicolae Manolache

The present paper concerns the invariants of generically nef vector bundles on ruled surfaces. By Mehta - Ramanathan Restriction Theorem and by Miyaoka characterization of semistable vector bundles on a curve, the generic nefness can be…

Algebraic Geometry · Mathematics 2018-03-28 Valentina Beorchia , Francesco Zucconi

We show that a proper algebraic n-dimensional scheme Y admits nontrivial vector bundles of rank n, even if Y is non-projective, provided that there is a modification containing a projective Cartier divisor that intersects the exceptional…

Algebraic Geometry · Mathematics 2015-08-25 Markus Perling , Stefan Schroeer

In this article, we consider the projective bundle $\mathbb{P}_X(E)$ over a smooth complex projective variety $X$, where $E$ is a semistable bundle on $X$ with $c_2(End(E)) =0$. We give a necessary and sufficient condition to get the…

Algebraic Geometry · Mathematics 2021-02-19 Snehajit Misra

We show that under some assumptions on the monodromy group some combinations of higher Chern classes of flat vector bundles are torsion in the Chow group. Similar results hold for flat vector bundles that deform to such flat vector bundles…

Algebraic Geometry · Mathematics 2021-07-08 Adrian Langer

Let ${\mathbb F}_0$ be an algebraically closed field, with $char({\mathbb F}_0)=0$. In this article, for prime numbers $p\geq 2$, we construct smooth affine algebras $B$ over ${\mathbb F}_0$, with $\dim B=p+2$. Further, we construct…

K-Theory and Homology · Mathematics 2026-03-10 Satya Mandal
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