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Related papers: Log canonical thresholds of del Pezzo surfaces

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In this paper we give an upper bound for the Picard number of the rational surfaces which resolve minimally the singularities of toric log Del Pezzo surfaces of given index $\ell$. This upper bound turns out to be a quadratic polynomial in…

Algebraic Geometry · Mathematics 2010-02-14 Dimitrios I. Dais , Benjamin Nill

We classify del Pezzo non-commutative surfaces that are finite over their centres and have no worse than canonical singularities. Using the minimal model program, we introduce the minimal model of such surfaces. We first classify the…

Algebraic Geometry · Mathematics 2020-02-13 Amir Nasr

This paper focuses on the classification of all toric log Del Pezzo surfaces with exactly one singularity up to isomorphism, and on the description of how they are embedded as intersections of finitely many quadrics into suitable projective…

Algebraic Geometry · Mathematics 2017-06-13 Dimitrios I. Dais

In this article, we obtain an upper bound for the number of integral points on the del Pezzo surfaces of degree two.

Number Theory · Mathematics 2020-10-30 Aritra Ghosh , Sumit Kumar , Kummari Mallesham , Saurabh Kumar Singh

We investigate the variation of log canonical thresholds in (graded) linear systems. For toric log Fano varieties, we give a sharp lower bound for log canonical thresholds of the anticanonical members in terms of the global minimal log…

Algebraic Geometry · Mathematics 2014-11-12 Florin Ambro

A normal projective non-Gorenstein log-terminal surface $S$ is called a log del Pezzo surface of index three if the three-times of the anti-canonical divisor $-3K_S$ is an ample Cartier divisor. We classify all of the log del Pezzo surfaces…

Algebraic Geometry · Mathematics 2014-01-08 Kento Fujita , Kazunori Yasutake

We completely classify K-stability of log del Pezzo hypersurfaces with index 2.

Algebraic Geometry · Mathematics 2022-02-09 In-Kyun Kim , Nivedita Viswanathan , Joonyeong Won

We prove the ascending chain condition for log canonical thresholds of bounded coregularity.

Algebraic Geometry · Mathematics 2022-11-18 Fernando Figueroa , Joaquín Moraga , Junyao Peng

We characterise integral points of bounded log-anticanonical height on a quartic del Pezzo surface of singularity type $\mathbf{A}_3$ over imaginary quadratic fields with respect to its singularity and its lines. Furthermore, we count these…

Number Theory · Mathematics 2023-07-25 Judith Ortmann

This is an expanded version of our work [AN88], 1988, in Russian. We classify del Pezzo surfaces over C with log terminal singularities of index \le 2. By classification, we understand a description of the intersection graph of all…

Algebraic Geometry · Mathematics 2007-05-23 Valery Alexeev , Viacheslav V. Nikulin

In this paper, we classify del Pezzo foliations on projective manifolds of rank at least 3 and with log canonical singularities in the sense of McQuillan.

Algebraic Geometry · Mathematics 2021-10-07 João Paulo Figueredo

We classify all of the log del Pezzo surfaces $S$ of index $a$ such that the volume $(-K_S^2)$ is larger than or equal to $2a$.

Algebraic Geometry · Mathematics 2014-01-09 Kento Fujita

In order to study integral points of bounded log-anticanonical height on weak del Pezzo surfaces, we classify weak del Pezzo pairs. As a representative example, we consider a quartic del Pezzo surface of singularity type…

Number Theory · Mathematics 2025-05-19 Ulrich Derenthal , Florian Wilsch

We introduce the notion of strongly asymptotically log del Pezzo flags, and classify such flags under the assumption that their zero-dimensional part lies in the boundary. We use this result to give a new and conceptual proof of the…

Algebraic Geometry · Mathematics 2024-11-20 Yanir A. Rubinstein

In this paper, we first present the complete list of the singularity types of the Picard number one Gorenstein log del Pezzo surface and the number of the isomorphism classes with the given singularity type. Then we give out a method to…

Algebraic Geometry · Mathematics 2007-05-23 Qiang Ye

Let $(X,D)$ be an open log del Pezzo surface of rank one, that is, $X$ is a normal projective surface of Picard rank one, the boundary $D$ is a reduced nonzero divisor on $X$, and the anti-log canonical divisor $-(K_X+D)$ is ample. We show…

Algebraic Geometry · Mathematics 2025-08-20 Karol Palka , Tomasz Pełka

We completely determine the existence of anticanonical polar cylinders in quasi-smooth log del Pezzo surfaces of index one.

Algebraic Geometry · Mathematics 2025-06-03 In-Kyun Kim , Jaehyun Kim , Joonyeong Won

In an algebro-geometric way, we completely determine whether smooth del Pezzo surfaces are K-(semi)stable or not.

Algebraic Geometry · Mathematics 2019-03-25 Jihun Park , Joonyeong Won

We prove several boundedness statements for geometrically integral normal del Pezzo surfaces $X$ over arbitrary fields. We give an explicit sharp bound on the irregularity if $X$ is canonical or regular. In particular, we show that wild…

Algebraic Geometry · Mathematics 2025-04-23 Fabio Bernasconi , Gebhard Martin

Upper and lower bounds, of the expected order of magnitude, are obtained for the number of rational points of bounded height on any quartic del Pezzo surface over $\mathbb{Q}$ that contains a conic defined over $\mathbb{Q}$.

Number Theory · Mathematics 2018-07-17 T. D. Browning , E. Sofos