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This paper deals with two problems about vector bundles on bielliptic surfaces. The first is to give a classification of Ulrich bundles on such surfaces $S$, which depends on the topological type of $S$. In doing so, we study the weak…

Algebraic Geometry · Mathematics 2026-01-23 Edoardo Mason

We show the existence of rank 6 Ulrich bundles on a smooth cubic fourfold. First, we construct a simple sheaf E of rank 6 as an elementary modification of an ACM bundle of rank 6 on a smooth cubic fourfold. Such an E appears as an extension…

Algebraic Geometry · Mathematics 2022-09-20 Daniele Faenzi , Yeongrak Kim

Let X be a smooth projective variety carrying an Ulrich bundle. In the first part of this note, we construct an Ulrich sheaf on n-th symmetric power of X, which is a singular variety when $DimX >1$. As a consequence, we get the existence of…

Algebraic Geometry · Mathematics 2025-11-26 Anindya Mukherjee , Pabitra Barik

We classify the Ulrich vector bundles of arbitrary rank on smooth projective varieties of minimal degree. In the process, we prove the stability of the sheaves of relative differentials on rational scrolls.

Algebraic Geometry · Mathematics 2017-05-23 Marian Aprodu , Sukmoon Huh , Francesco Malaspina , Joan Pons-Llopis

We determine the Picard number and the Ulrich complexity of general bidouble covers of the projective plane, providing the first systematic study of Ulrich bundles on non-cyclic abelian covers. For a bidouble plane branched along three…

Algebraic Geometry · Mathematics 2026-02-11 Jerson Caro , Juan Cruz-Penagos , Sergio Troncoso

Ulrich bundles are the simplest sheaves from the viewpoint of cohomology tables. Eisenbud and Schreyer conjectured that every projective variety carries an Ulrich bundle, which means it has the same cone of cohomology table as the…

Algebraic Geometry · Mathematics 2014-06-26 Yeongrak Kim

We construct an Ulrich bundle on the blowup at a point when the original variety is embedded by a sufficiently positive linear system and carries an Ulrich bundle. In particular, we describe the relation between special Ulrich bundles on…

Algebraic Geometry · Mathematics 2016-07-12 Yeongrak Kim

Let $X$ be a smooth projective algebraic surface of Picard rank one with very ample canonical bundle $K_X$. We further assume that $q -1 \le \chi(\mathcal{O}_X$. In this article, we will study the existence of the Ulrich bundle and its…

Algebraic Geometry · Mathematics 2022-05-03 Suratno Basu , Sarbeswar Pal

We use certain special prehomogeneous representations of algebraic groups in order to construct aCM vector bundles, possibly Ulrich, on certain families of hypersurfaces. Among other results, we show that a general cubic hypersurface of…

Algebraic Geometry · Mathematics 2018-03-22 Laurent Manivel

We prove an existence result for stable vector bundles with arbitrary rank on an algebraic surface, and determine the birational structure of certain moduli space of stable bundles on a rational ruled surface.

Algebraic Geometry · Mathematics 2016-09-06 Wei-ping Li , Zhenbo Qin

Some classification results for ample vector bundles of rank 2 on Hirzebruch surfaces, and on Del Pezzo surfaces, are obtained. In particular, we classify rank-2 ample vector bundles with $c_2$ less than 7 on Hirzebruch surfaces, and with…

alg-geom · Mathematics 2008-02-03 Hironobu Ishihara

We study Ulrich bundles and their moduli on unnodal Enriques surfaces. In particular, we prove that unnodal Enriques surfaces are of wild representation type by constructing moduli spaces of stable Ulrich bundles of arbitrary rank and…

Algebraic Geometry · Mathematics 2016-06-07 Lev Borisov , Howard Nuer

After recalling the definition and basic properties of Ulrich bundles, we focus on the existence problem: does any smooth projective variety carry a Ulrich bundle? We show that the Serre construction provides a positive answer on certain…

Algebraic Geometry · Mathematics 2016-12-16 Arnaud Beauville

In this note we prove that certain twisted flag varieties carry Ulrich bundles.

Algebraic Geometry · Mathematics 2018-08-21 Saša Novaković

This work provides a curve-based approach to Ulrich bundles on surfaces, establishing a correspondence that characterizes their existence, with a focus on applications to surfaces in $\mathbb{P}^3$.

Algebraic Geometry · Mathematics 2025-10-16 Sofia Bordoni

We give examples of surfaces which are Ulrich-wild, i.e. that support families of dimension $p$ of pairwise non-isomorphic, indecomposable, Ulrich bundles for arbitrary large $p$.

Algebraic Geometry · Mathematics 2020-09-28 Gianfranco Casnati

We construct Ulrich bundles on Veronese threefolds of arbitrary degree as generic deformations of symmetric squares of equivariant instanton bundles on the projective space, thus classifying the rank of Ulrich bundles on such varieties and…

Commutative Algebra · Mathematics 2025-11-19 Daniele Faenzi , Victor Do Valle Pretti

We prove existence of aCM and Ulrich sheaves respect to ample and globally generated polarisations on a class of special finite coverings $f:X\to\mathbb{P}^n$, which in particular contains cyclic ones. In the case of rank $2$ on double…

Algebraic Geometry · Mathematics 2025-11-03 Roberto Vacca

We show that there exist flat surface bundles with closed leaves having non-trivial normal bundles. This leads us to compute the Abelianisation of surface diffeomorphism groups with marked points. We also extend a formula of Tsuboi that…

Geometric Topology · Mathematics 2014-10-01 Jonathan Bowden

In this paper, we investigate the existence of Ulrich bundles on a smooth complete intersection of two $4$-dimensional quadrics in $\mathbb P^5$ by two completely different methods. First, we find good ACM curves and use Serre…

Algebraic Geometry · Mathematics 2017-04-12 Yonghwa Cho , Yeongrak Kim , Kyoung-Seog Lee