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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

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

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

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 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 provide a classification of globally generated vector bundles with $c_1 = 5$ on the projective 3-space. The classification is complete (except for one case) but not as detailed as the corresponding classification in the case $c_1 = 4$…

Algebraic Geometry · Mathematics 2018-05-30 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 determine the Chern classes of globally generated rank two vector bundles on P^2.

Algebraic Geometry · Mathematics 2012-11-27 Philippe Ellia

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 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

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 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 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 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 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 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

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

Assuming Hartshorne's conjecture on complete intersections, we classify projective bundles over projective spaces which has a smooth blow up structure over another projective space. Under some assumptions, we also classify projective…

Algebraic Geometry · Mathematics 2024-12-03 Supravat Sarkar

We give a new proof of the classification due to Peternell-Szurek-Wi\'{s}niewski of nef vector bundles on a projective space with the first Chern class less than three and on a smooth hyperquadric with the first Chern class less than two…

Algebraic Geometry · Mathematics 2016-07-19 Masahiro Ohno

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
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