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In this paper we classify all potentially G-birationally rigid del Pezzo threefolds of degree 4 and their automorphism groups and prove the G-birational rigidity of one of them

Algebraic Geometry · Mathematics 2018-12-31 Artem Avilov

This article primarily aims at classifying, on certain K3 surfaces, the elliptic fibrations induced by conic bundles on smooth del Pezzo surfaces. The key geometric tool employed is the Alexeev-Nikulin correspondence between del Pezzo…

Algebraic Geometry · Mathematics 2024-03-28 Paola Comparin , Pedro Montero , Yulieth Prieto-Montañez , Sergio Troncoso

We study the K-moduli of log del Pezzo pairs formed by a del Pezzo surface of degree $d$ and an anti-canonical divisor. These moduli spaces naturally depend on one parameter, providing a natural problem in variations of K-moduli spaces. For…

Algebraic Geometry · Mathematics 2024-07-01 Jesus Martinez-Garcia , Theodoros Stylianos Papazachariou , Junyan Zhao

We study del Pezzo surfaces that are quasismooth and well-formed weighted hypersurfaces. In particular, we find all such surfaces whose alpha-invariant of Tian is greater than 2/3.

Algebraic Geometry · Mathematics 2011-12-30 Ivan Cheltsov , Constantin Shramov

Let $X$ be a del Pezzo surface over the function field of a complex curve. We study the behavior of rational points on $X$ leading to bounds on the counting function in Geometric Manin's Conjecture. A key tool is the Movable Bend and Break…

Algebraic Geometry · Mathematics 2021-07-13 Brian Lehmann , Sho Tanimoto

In this note, we compute the Poisson cohomology groups for any Poisson Del Pezzo surface.

Mathematical Physics · Physics 2011-02-09 Wei Hong , Ping Xu

Motivated by homological mirror symmetry, this paper constructs explicit full exceptional collections for the canonical stacks associated with the series of log del Pezzo surfaces constructed by Johnson and Koll\'ar. These surfaces have…

Algebraic Geometry · Mathematics 2023-09-27 Giulia Gugiatti , Franco Rota

We classify all complex surfaces with quotient singularities that do not contain any smooth rational curves, under the assumption that the canonical divisor of the surface is not pseudo-effective. As a corollary we show that if $X$ is a log…

Algebraic Geometry · Mathematics 2018-10-17 Ziquan Zhuang

We introduce a concept of minimality for Fano polygons. We show that, up to mutation, there are only finitely many Fano polygons with given singularity content, and give an algorithm to determine the mutation-equivalence classes of such…

Algebraic Geometry · Mathematics 2022-10-28 Alexander Kasprzyk , Benjamin Nill , Thomas Prince

We solve categorical Torelli problem for quartic del Pezzo surfaces. That is, we prove that a del Pezzo surface of degree $4$ can be canonically reconstructed from its Kuznetsov component, which is the orthogonal subcategory to the…

Algebraic Geometry · Mathematics 2026-03-30 Alexey Elagin

In earlier joint work with our collaborators Akhtar, Coates, Corti, Heuberger, Kasprzyk, Prince and Tveiten, we gave a conjectural classification of a broad class of orbifold del Pezzo surfaces, using Mirror Symmetry. We proposed that del…

Algebraic Geometry · Mathematics 2019-02-07 Alessandro Oneto , Andrea Petracci

Let $X$ be a del Pezzo surface of degree $2$ or greater over a finite field $\mathbb{F}_q$. The image $\Gamma$ of the Galois group $\operatorname{Gal}(\overline{\mathbb{F}}_q / \mathbb{F}_q)$ in the group…

Algebraic Geometry · Mathematics 2018-03-21 Andrey Trepalin

Inspired by M-theory and superconformal field theory, we extend the notions of local Gromov-Witten invariants from the case of del Pezzo surfaces to shrinkable surfaces, a class of reducible surfaces with simple normal crossings satisfying…

Algebraic Geometry · Mathematics 2023-09-13 Sheldon Katz , Sungwoo Nam

We describe a notion of lattice polarization for rational elliptic surfaces and weak del Pezzo surfaces, and describe the complex moduli of the former and the K\"{a}hler cone of the latter. We then propose a version of mirror symmetry…

Algebraic Geometry · Mathematics 2018-09-28 Charles F. Doran , Alan Thompson

We prove the Batyrev-Manin conjecture for smooth equivariant compactifications of forms of $\mathbb{G}_a^n$ over a global function field $F$, assuming some conditions on the boundary divisor. To verify that the leading constant agrees with…

Number Theory · Mathematics 2025-05-08 Abdulmuhsin Alfaraj

We present new constructions of Kaehler metrics with constant scalar curvature on complex surfaces, in particular on certain del Pezzo surfaces. Some higher dimensional examples are provided as well.

Differential Geometry · Mathematics 2007-05-23 Yann Rollin , Michael A. Singer

We classify finite subgroups $G\subset\mathrm{PGL}_4(\mathbb{C})$ such that $\mathbb{P}^3$ is not $G$-birational to conic bundles and del Pezzo fibrations, and explicitly describe all $G$-Mori fibre spaces that are $G$-birational to…

Algebraic Geometry · Mathematics 2022-02-21 Ivan Cheltsov , Arman Sarikyan

I prove new local inequality for divisors on smooth surfaces, describe its applications, and compare it to a similar local inequality that is already known by experts.

Algebraic Geometry · Mathematics 2013-11-22 Ivan Cheltsov

We study the GIT compactifications of pairs formed by a hypersurface and a hyperplane. We provide a general setting to characterize all polarizations which give rise to different GIT quotients. Furthermore, we describe a finite set of…

Algebraic Geometry · Mathematics 2018-04-12 Patricio Gallardo , Jesus Martinez-Garcia

We prove that all geometric helices in the derived category of coherent sheaves on a del Pezzo surface are related by a sequence of elementary operations: rotation, shifting, orthogonal reordering, tensoring by a line bundle, and tilting.…

Algebraic Geometry · Mathematics 2026-04-20 Pierrick Bousseau