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We complete the classification of globally generated vector bundles with small $c_1$ on projective spaces by treating the case $c_1 = 5$ on $\mathbb{P}^n$, $n \geq 4$ (the case $c_1 \leq 3$ has been considered by Sierra and Ugaglia, while…

Algebraic Geometry · Mathematics 2020-11-09 Cristian Anghel , Iustin Coanda , Nicolae Manolache

One classifies the globally generated vector bundles on P^n (n \not = 3) with the first Chern class c_1 = 3. The case n = 3 is treated in arXiv:1202.5988 [math.AG]. The case c_1 = 2 was treated by J.C. Sierra and L. Ugaglia (see…

Algebraic Geometry · Mathematics 2012-02-29 Cristian Anghel , Nicolae Manolache

We classify globally generated vector bundles with first Chern class $c_1$ at least 4 on the projective 3-space with the property that $E(-c_1+3)$ has a non-zero global section. This (seemingly) technical result allows one to reduce the…

Algebraic Geometry · Mathematics 2016-04-08 Cristian Anghel , Iustin Coanda , Nicolae Manolache

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 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

One classifies the globally generated vector bundles on P^3 with the first Chern class c_1=3. The case c_1=2 on P^n was done by J.C. Sierra and L. Ugaglia (see the References) and the case c_1=3, rank=2 on P^n was done by S. Huh (see the…

Algebraic Geometry · Mathematics 2012-02-28 Nicolae Manolache

We classify rank two globally generated vector bundles on P^n, n > 2, with c_1 \leq 5. The classification is complete but for one case (n = 3, c_1 = 5, c_2 = 12)

Algebraic Geometry · Mathematics 2011-11-28 Ludovica Chiodera , Philippe Ellia

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

We classify globally generated vector bundles on $\mathbb{P}^1 \times \mathbb{P}^2$ with small first Chern class, i.e. $c_1= (a,b)$, $a+b \leq 3$. Our main method is to investigate the associated smooth curves to globally generated vector…

Algebraic Geometry · Mathematics 2015-01-23 Edoardo Ballico , Sukmoon Huh , Francesco Malaspina

We give the classification of globally generated vector bundles of rank $2$ on a smooth quadric surface with $c_1\le (2,2)$ in terms of the indices of the bundles, and extend the result to arbitrary higher rank case. We also investigate…

Algebraic Geometry · Mathematics 2014-06-16 Edoardo Ballico , Sukmoon Huh , Francesco Malaspina

We investigate the existence of globally generated vector bundles of rank 2 with $c_1\leq 3$ on a smooth quadric threefold and determine their Chern classes. As an automatic consequence, every rank 2 globally generated vector bundle on $Q$…

Algebraic Geometry · Mathematics 2013-06-05 Edoardo Ballico , Sukmoon Huh , Francesco Malaspina

We combine the idea of Chang and Ran [Invent. Math. 76 (1984), 41-54] of using monads of vector bundles on the projective 3-space to prove the unirationality of the moduli spaces of curves of low genus with our classification of globally…

Algebraic Geometry · Mathematics 2021-06-03 Cristian Anghel , Iustin Coanda , Nicolae Manolache

We classify globally generated vector bundles on $\mathbf{P}^1 \times \mathbf{P}^1 \times \mathbf{P}^1$ with small first Chern class, i.e. $c_1= (a_1, a_2, a_3)$, $a_i \le 2$. Our main method is to investigate the associated smooth curves…

Algebraic Geometry · Mathematics 2015-02-24 Edoardo Ballico , Sukmoon Huh , Francesco Malaspina

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 consider the problem of determining all pairs (c_1, c_2) of Chern classes of rank 2 bundles that are cokernel of a skew-symmetric matrix of linear forms in 3 variables, having constant rank 2c_1 and size 2c_1+2. We completely solve the…

Algebraic Geometry · Mathematics 2016-02-09 Ada Boralevi , Emilia Mezzetti

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 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 investigate the globally generated vector bundles on complete intersection Calabi-Yau threefolds with the first Chern class at most 2. We classify all the globally generated vector bundles of an arbitrary rank on quintic in…

Algebraic Geometry · Mathematics 2015-01-23 Edoardo Ballico , Sukmoon Huh , Francesco Malaspina

We determine the Chern classes of globally generated rank two vector bundles on P^2.

Algebraic Geometry · Mathematics 2012-11-27 Philippe Ellia

In this paper, we study special generalized null correlation bundles on $\mathbb{P}^{5}$. We prove that special generalized null correlation bundles on $\mathbb{P}^{5}$ are stable under some numerical conditions. Moreover, we prove that the…

Algebraic Geometry · Mathematics 2021-07-27 Shijie Shang
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