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Related papers: Complex Multiplication for K3 Surfaces

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We study K3 surfaces with complex multiplication following the classical work of Shimura on CM abelian varieties. After we translate the problem in terms of the arithmetic of the CM field and its id\`{e}les, we proceed to study some abelian…

Number Theory · Mathematics 2021-06-11 Domenico Valloni

We prove a variant of the reciprocity laws for CM abelian varieties, CM K3 surfaces, and CM points on Shimura varieties. Given a CM object over the complex numbers, our variation describes the set of all models over a given number field $F$…

Number Theory · Mathematics 2018-06-19 Lenny Taelman

In this note we define moduli functors of (primitively) polarized K3 spaces. We show that they are representable by Deligne-Mumford stacks over Spec(Z). Further, we look at K3 spaces with a level structure. Our main result is that the…

Algebraic Geometry · Mathematics 2007-05-23 Jordan Rizov

In the theory of complex multiplication, it is important to construct class fields over CM fields. In this paper, we consider explicit $K3$ surfaces parametrized by Klein's icosahedral invariants. Via the periods and the Shioda-Inose…

Number Theory · Mathematics 2017-08-03 Atsuhira Nagano

Kuga and Satake associate with every polarized complex K3 surface (X,L) a complex abelian variety called the Kuga-Satake abelian variety of (X,L). We use this construction to define morphisms between moduli spaces of polarized K3 surface…

Algebraic Geometry · Mathematics 2007-05-23 Jordan Rizov

We consider the transcendental motive of three K3 surfaces $X$ conjectured to have complex multiplication (CM). Under this assumption, we match these to explicit algebraic Hecke quasi-characters $\psi_X$, and CM abelian threefolds $A$. This…

Number Theory · Mathematics 2025-08-04 Edgar Costa , Andreas-Stephan Elsenhans , Jörg Jahnel , John Voight

We report on a new approach, as well as some related experiments, to construct families of K3 surfaces having real or complex multiplication. The approach is based on an explicit description of the transcendental part of the cohomology in a…

Algebraic Geometry · Mathematics 2022-04-12 Andreas-Stephan Elsenhans , Jörg Jahnel

Following Valloni, we study complex projective K3 surfaces having complex multiplication by rings of integers.

Algebraic Geometry · Mathematics 2025-06-03 Eva Bayer-Fluckiger

In this paper we construct various moduli spaces of K3 surfaces $M$ equipped with a surjective holomorphic map $\pi:M\to\Pb^1$ with generic fiber a complex torus (e.g., an elliptic fibration). Examples include moduli spaces of such maps…

Algebraic Geometry · Mathematics 2024-12-17 Benson Farb , Eduard Looijenga

We study abelian varieties and K3 surfaces with complex multiplication defined over number fields of fixed degree. We show that these varieties fall into finitely many isomorphism classes over an algebraic closure of the field of rational…

Algebraic Geometry · Mathematics 2019-02-20 Martin Orr , Alexei N. Skorobogatov

Motivated by the relation between (twisted) K3 surfaces and special cubic fourfolds, we construct moduli spaces of polarized twisted K3 surfaces of any fixed degree and order. We do this by mimicking the construction of the moduli space of…

Algebraic Geometry · Mathematics 2019-10-09 Emma Brakkee

Strange duality is shown to hold over generic $K3$ surfaces in a large number of cases. The isomorphism for elliptic $K3$ surfaces is established first via Fourier-Mukai techniques. Applications to Brill-Noether theory for sheaves on $K3$s…

Algebraic Geometry · Mathematics 2019-12-19 Alina Marian , Dragos Oprea , Kota Yoshioka

In this paper we show that the moduli space of nodal cubic surfaces is isomorphic to a quotient of a 4-dimensional complex ball by an arithmetic subgroup of the unitary group. This complex ball uniformization uses the periods of certain K3…

Algebraic Geometry · Mathematics 2007-05-23 I. Dolgachev , B. van Geemen , S. Kondo

We outline a method to compute rational models for the Hilbert modular surfaces Y_{-}(D), which are coarse moduli spaces for principally polarized abelian surfaces with real multiplication by the ring of integers in Q(sqrt{D}), via moduli…

Number Theory · Mathematics 2015-01-27 Noam Elkies , Abhinav Kumar

In the moduli space of polarized varieties the same unpolarized variety can occur multiple times However, for K3 surfaces, compact hyperk\"ahler manifolds, and abelian varieties the number is finite. This may be viewed as a consequence of…

Algebraic Geometry · Mathematics 2019-08-20 Daniel Huybrechts

This paper gives upper and lower bounds for the degree of the field of definition of a singular K3 surface, generalising a recent result by Shimada. We use work of Shioda-Mitani and Shioda-Inose and classical theory of complex…

Algebraic Geometry · Mathematics 2007-05-23 Matthias Schuett

We study the good reduction modulo p of K3 surfaces with complex multiplication. If a K3 surface with complex multiplication has good reduction, we calculate the Picard number and the height of the formal Brauer group of the reduction.…

Algebraic Geometry · Mathematics 2018-12-03 Kazuhiro Ito

We establish a relationship between mirror symmetry for K3 surfaces and Arnold's strange duality for K3 surfaces. We compute various examples of mirror families. Among them the mirror moduli family for the moduli space of degree 2n…

alg-geom · Mathematics 2008-02-03 Igor V. Dolgachev

We exhibit large families of K3 surfaces with real multiplication, both abstractly using lattice theory, the Torelli theorem and the surjectivity of the period map, as well as explicitly using dihedral covers and isogenies.

Algebraic Geometry · Mathematics 2025-01-29 Bert van Geemen , Matthias Schütt

We study moduli spaces of lattice-polarized K3 surfaces in terms of orbits of representations of algebraic groups. In particular, over an algebraically closed field of characteristic 0, we show that in many cases, the nondegenerate orbits…

Algebraic Geometry · Mathematics 2017-07-03 Manjul Bhargava , Wei Ho , Abhinav Kumar
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