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We describe Baily-Borel, toroidal, and geometric -- using the KSBA stable pairs -- compactifications of some moduli spaces of K3 surfaces with a nonsymplectic automorphism of order $3$ and $4$ for which the fixed locus of the automorphism…

Algebraic Geometry · Mathematics 2025-02-12 Valery Alexeev , Anand Deopurkar , Changho Han

We prove that a K3 surface with an automorphism acting on the global $2$-forms by a primitive $m$-th root of unity, $m \neq 1,2,3,4,6$, does not degenerate (assuming the existence of the so-called Kulikov models). A key result used to prove…

Algebraic Geometry · Mathematics 2023-12-27 Yuya Matsumoto

Using the properties of generalized Fibonacci numbers, we determine the automorphism groups of some K3 surfaces with Picard number 2. Conversely, using the automorphisms of K3 surfaces with Picard number 2, we prove the criterion for a…

Algebraic Geometry · Mathematics 2024-11-21 Kwangwoo Lee

A Shioda--Inose structure is a geometric construction which associates to an Abelian surface a projective K3 surface in such a way that their transcendental lattices are isometric. This geometric construction was described by Morrison by…

Algebraic Geometry · Mathematics 2022-09-22 Alice Garbagnati , Yulieth Prieto Montañez

We present three interesting projective models of the supersingular K3 surface X in characteristic 5 with Artin invariant 1. For each projective model, we determine smooth rational curves on X with the minimal degree and the projective…

Algebraic Geometry · Mathematics 2014-08-26 Toshiyuki Katsura , Shigeyuki Kondo , Ichiro Shimada

We study K3 surfaces with a pair of commuting involutions that are non-symplectic with respect to two anti-commuting complex structures that are determined by a hyper-K\"ahler metric. One motivation for this paper is the role of such…

Algebraic Geometry · Mathematics 2018-09-21 Frank Reidegeld

We construct a non-Kummer projective K3 surface $X$ which admits compact Levi-flats by holomorphically patching two open complex surfaces obtained as the complements of tubular neighborhoods of elliptic curves embedded in blow-ups of the…

Algebraic Geometry · Mathematics 2025-08-06 Takayuki Koike , Takato Uehara

In this paper we classify complex K3 surfaces with non-symplectic automorphism of order 8 that leaves invariant a smooth elliptic curve. We show that the rank of the Picard group is either 10, 14 or 18 and the fixed locus is the disjoint…

Algebraic Geometry · Mathematics 2016-12-06 Dima Al Tabbaa , Alessandra Sarti

In the context of K3 mirror symmetry, the Greene-Plesser orbifolding method constructs a family of K3 surfaces, the mirror of quartic hypersurfaces in $\mathbb{P}^3$, starting from a special one-parameter family of K3 varieties known as the…

Algebraic Geometry · Mathematics 2022-05-31 Noah Braeger , Andreas Malmendier , Yih Sung

Given a cubic curve $C$ over a number field, we consider the K3 surface $Y_C$ constructed as the minimal desingularisation of the quotient of $C \times C$ by an automorphism of order 3. We relate the transcendental Brauer groups of $Y_C$…

Number Theory · Mathematics 2025-09-30 Giorgio Navone

It is known that the automorphism group of any projective K3 surface is finitely generated [24]. In this paper, we consider a certain kind of K3 surfaces with Picard number 3 whose automorphism groups are isomorphic to congruence subgroups…

Algebraic Geometry · Mathematics 2023-08-15 Kenji Hashimoto , Kwangwoo Lee

In this paper we show that there is a correspondence between some $K3$ surfaces with non-isometric transcendental lattices constructed as a twist of the transcendental lattice of the Jacobian of a generic genus 2 curve. Moreover, we show…

Algebraic Geometry · Mathematics 2007-05-23 Federica Galluzzi , Giuseppe Lombardo

In this paper we provide a complete classification of non-symplectic automorphisms of order nine of complex K3 surfaces.

Algebraic Geometry · Mathematics 2019-04-04 Michela Artebani , Paola Comparin , María Elisa Valdés

We prove that the moduli spaces of K3 surfaces with non-symplectic involutions are unirational. As a by-product we describe configuration spaces of 4<d<9 points in the projective plane as arithmetic quotients of type IV.

Algebraic Geometry · Mathematics 2014-02-26 Shouhei Ma

The article revisits birational and biregular automorphisms of the Hilbert scheme of points on a K3 surface from the perspective of derived categories. Under the assumption that the K3 surface is generic, the birational and biregular…

Algebraic Geometry · Mathematics 2026-05-26 Ziqi Liu

In this note we prove analogues of the main theorems of complex multiplication for abelian varieties for K3 surfaces. This is done by studying the field of definition of the period morphism for complex K3 surfaces. More precisely we relate…

Algebraic Geometry · Mathematics 2007-05-23 Jordan Rizov

With any hyper-K\"ahler variety $K$ of generalized Kummer type is associated via Hodge theory a K3 surface $S_K$. We show how they are related geometrically through a moduli space of sheaves on $S_K$. As a consequence, building…

Algebraic Geometry · Mathematics 2025-11-26 Salvatore Floccari

We find generators of the group of birational automorphisms of the Hessian surface of a general cubic surface. Its nonsingular minimal model is a K3 surface with the Picard lattice of rank 16. The latter embeds naturally in the even…

Algebraic Geometry · Mathematics 2016-09-07 Igor V. Dolgachev , Jonghae Keum

The 4-dimensional abstract Kummer variety K^4 with 16 nodes leads to the K3 surface by resolving the 16 singularities. Here we present a simplicial realization of this minimal resolution. Starting with a minimal 16-vertex triangulation of…

Combinatorics · Mathematics 2019-10-24 Jonathan Spreer , Wolfgang Kühnel

Mukai showed that projective models of Brill-Noether general polarized K3 surfaces of genus $6-10$ and $12$ are obtained as linear sections of projective homogeneous varieties, and that their hyperplane sections are Brill-Noether general…

Algebraic Geometry · Mathematics 2025-04-09 Richard Haburcak