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We give a simple proof of the statement that every rational curve in the primitive class of a general K3 surface is nodal.

Algebraic Geometry · Mathematics 2007-05-23 Xi Chen

We complete the remaining cases of the conjecture predicting existence of infinitely many rational curves on K3 surfaces in characteristic zero, prove almost all cases in positive characteristic and improve the proofs of the previously…

Algebraic Geometry · Mathematics 2023-05-24 Xi Chen , Frank Gounelas , Christian Liedtke

We proved that the union of rational curves is dense on a very general K3 surface and the union of elliptic curves is dense in the 1st jet space of a very general K3 surface, both in the strong topology.

Algebraic Geometry · Mathematics 2015-03-17 Xi Chen , James D. Lewis

We prove that any non-isotrivial elliptic K3 surface over an algebraically closed field $k$ of arbitrary characteristic contains infinitely many rational curves. In the case when $\mathrm{char}(k)\neq 2,3$, we prove this result for any…

Algebraic Geometry · Mathematics 2020-01-20 Salim Tayou

In this paper, we study $\mathbb{A}^1$ curves on log K3 surfaces. We classify all genuine log K3 surfaces of type II which admits countably infinite $\mathbb{A}^1$ curves.

Algebraic Geometry · Mathematics 2017-05-17 Xi Chen , Yi Zhu

We proved that every rational curves in the primitive class of a general K3 surface of any genus is nodal.

Algebraic Geometry · Mathematics 2007-05-23 Xi Chen

We investigate the universal Severi variety of rational curves on K3 surfaces, which parametrises irreducible rational curves in a fixed class on varying K3 surfaces of fixed genus. We investigate the conjecuted irreducibility of this space…

Algebraic Geometry · Mathematics 2014-07-23 Michael Kemeny

The notion of constant cycle curves on K3 surfaces is introduced. These are curves that do not contribute to the Chow group of the ambient K3 surface. Rational curves are the most prominent examples. We show that constant cycle curves…

Algebraic Geometry · Mathematics 2024-06-03 Daniel Huybrechts , Claire Voisin

We report on recent results concerning the construction of curves on K3 surfaces: the proof of the Tate conjecture for K3 surfaces in odd characteristic (after Maulik, Charles and Madapusi Pera), and the construction of infinitely many…

Algebraic Geometry · Mathematics 2019-11-11 Olivier Benoist

We discuss K3 surfaces in characteristic two that contain the Kummer configuration formed by smooth rational curves on it.

Algebraic Geometry · Mathematics 2023-12-05 Igor V. Dolgachev

We study the distribution of algebraic points on K3 surfaces.

Algebraic Geometry · Mathematics 2007-05-23 Fedor Bogomolov , Yuri Tschinkel

We describe the possible 3-divisible $A_2^n$ configurations of smooth rational curves on K3 surfaces in characteristic 3 and fully classify the resulting triple covers.

Algebraic Geometry · Mathematics 2026-04-29 Toshiyuki Katsura , Matthias Schütt

We prove that, for a K3 surface in characteristic p > 2, the automorphism group acts on the nef cone with a rational polyhedral fundamental domain and on the nodal classes with finitely many orbits. As a consequence, for any non-negative…

Algebraic Geometry · Mathematics 2019-10-30 Max Lieblich , Davesh Maulik

Let $(S,H)$ be a general primitively polarized $K3$ surface of genus $\p$ and let $p_a(nH)$ be the arithmetic genus of $nH.$ We prove the existence in $|\mathcal O_S(nH)|$ of curves with a triple point and $A_k$-singularities. In…

Algebraic Geometry · Mathematics 2012-09-05 Concettina Galati

Let k be a finite field with characteristic exceeding 3. We prove that the space of rational curves of fixed degree on any smooth cubic hypersurface over k with dimension at least 11 is irreducible and of the expected dimension.

Algebraic Geometry · Mathematics 2016-11-04 Tim Browning , Pankaj Vishe

We proved the existence of rational curves in every linear system on a general K3 surface and that all rational curves in the hyperplane class are nodal on a general K3 surface of small genus.

Algebraic Geometry · Mathematics 2007-05-23 Xi Chen

We show that Miyaoka's bound for the number of conics on a degree-2h K3 surface is attained for high h, and analogously for higher even degree (smooth) rational curves.

Algebraic Geometry · Mathematics 2025-04-02 Sławomir Rams , Matthias Schütt

This paper studies curves on quartic K3 surfaces, or more generally K3 surfaces which are complete intersection in weighted projective spaces. A folklore conjecture concerning rational curves on K3 surfaces states that all K3 surfaces…

Algebraic Geometry · Mathematics 2019-02-01 Takeo Nishinou

In this paper we classify certain special ruled surfaces in $\R^3$ under the general theorem of characterization of constant angle surfaces. We study the tangent developable and conical surfaces from the point of view the constant angle…

Differential Geometry · Mathematics 2009-04-10 Ana-Irina Nistor

Green's Conjecture predicts than one can read off special linear series on an algebraic curve, by looking at the syzygies of its canonical embedding. We extend Voisin's results on syzygies of K3 sections, to the case of K3 surfaces with…

Algebraic Geometry · Mathematics 2014-01-14 Marian Aprodu , Gavril Farkas
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