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We give some examples of isomorphisms of moduli of sheaves induced by Fourier-Mukai functor. As applications, we give another proof on deformation type of some moduli spaces of sheaves on abelian and K3 surfaces.

Algebraic Geometry · Mathematics 2007-05-23 Kota Yoshioka

We study Fourier-Mukai equivalence of K3 surfaces in positive characteristic and show that the classical results over the complex numbers all generalize. The key result is a positive-characteristic version of the Torelli theorem that uses…

Algebraic Geometry · Mathematics 2018-06-18 Max Lieblich , Martin Olsson

We show that the classical Kuga-Satake construction gives rise, away from characteristic 2, to an open immersion from the moduli of primitively polarized K3 surfaces (of any fixed degree) to a certain regular integral model for a Shimura…

Number Theory · Mathematics 2014-06-05 Keerthi Madapusi Pera

There are strange dual pairs of bimodal singularities that are not assigned an invertible projectivisation in EbelingPloog. We study families of $K3$ surfaces associated to such pairs.

Algebraic Geometry · Mathematics 2019-10-24 Makiko Mase

Lazarsfeld proved Brill--Noether generality of any smooth curve in the linear system $|H|$ where $(X,H)$ is a polarized K3 surface with $\mathrm{Pic}(X) = \mathbb{Z}\cdot H$. Mukai introduced the notion of Brill--Noether generality for…

Algebraic Geometry · Mathematics 2026-01-22 Irina Shatova

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

In this paper we study equivariant moduli spaces of sheaves on a $ K3 $ surface $ X $ under a symplectic action of a finite group. We prove that under some mild conditions, equivariant moduli spaces of sheaves on $ X $ are irreducible…

Algebraic Geometry · Mathematics 2023-07-14 Yuhang Chen

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

Ebeling and Ploog \cite{EbelingPloog} studied a duality of bimodular singularities which is part of the Berglund--H$\ddot{\textnormal{u}}$bsch mirror symmetry. Mase and Ueda \cite{MU} showed that this duality leads to a polytope mirror…

Algebraic Geometry · Mathematics 2017-04-07 Makiko Mase

We consider moduli stacks of Bridgeland semistable objects that previously had only set-theoretic identifications with Uhlenbeck compactification spaces. On a K3 surface $X$, we give examples where such a moduli stack is isomorphic to a…

Algebraic Geometry · Mathematics 2012-03-08 Jason Lo

Given X a K3 surface, a mirror dual to X can be identified with a component of the moduli space of semistable sheaves on X. We consider fibrations by K3 surfaces over a one dimensional base that are Calabi-Yau and we charaterize the dual…

Algebraic Geometry · Mathematics 2013-03-08 Cristina Martínez Ramírez

We prove the Noether-Lefschetz conjecture on the moduli space of quasi-polarized K3 surfaces. This is deduced as a particular case of a general theorem that states that low degree cohomology classes of arithmetic manifolds of orthogonal…

Algebraic Geometry · Mathematics 2015-04-15 Nicolas Bergeron , Zhiyuan Li , John Millson , Colette Moeglin

We show that every supersingular K3 surface is birational to a double cover of a projective plane.

Algebraic Geometry · Mathematics 2007-05-23 Ichiro Shimada

In this paper, we show the moduli spaces of stable sheaves on K3 surfaces are irreducible symplectic manifolds, if the associated Mukai vectors are primitive. More precisely, we show that they are related to the Hilbert scheme of points. We…

Algebraic Geometry · Mathematics 2007-05-23 Kota Yoshioka

In this article we consider moduli properties of singular curves on K3 surfaces. Let $\mathcal{B}_g$ denote the stack of primitively polarized K3 surfaces $(X,L)$ of genus $g$ and let $\mathcal{T}^n_{g,k} \to \mathcal{B}_g$ be the stack…

Algebraic Geometry · Mathematics 2015-03-10 Michael Kemeny

We develop a theory of twistor spaces for supersingular K3 surfaces, extending the analogy between supersingular K3 surfaces and complex analytic K3 surfaces. Our twistor spaces are obtained as relative moduli spaces of twisted sheaves on…

Algebraic Geometry · Mathematics 2019-02-12 Daniel Bragg , Max Lieblich

We prove that the first order deformations of two smooth projective K3 surfaces are derived equivalent under a Fourier--Mukai transform if and only if there exists a special isometry of the total cohomology groups of the surfaces which…

Algebraic Geometry · Mathematics 2009-03-25 Emanuele Macri , Paolo Stellari , Sukhendu Mehrotra

The purpose of this note is twofold. We first review the theory of Fourier-Mukai partners together with the relevant part of Nikulin's theory of lattice embeddings via discriminants. Then we consider Fourier-Mukai partners of K3 surfaces in…

Algebraic Geometry · Mathematics 2012-06-21 Klaus Hulek , David Ploog

We investigate the moduli spaces of one- and two-dimensional sheaves on projective K3 and abelian surfaces that are semistable with respect to a nongeneral ample divisor with regard to the symplectic resolvability. We can exclude the…

Algebraic Geometry · Mathematics 2011-05-02 Markus Zowislok

We study the class of complex algebraic K3 surfaces admitting an embedding of H+E8+E8 inside the Neron-Severi lattice. These special K3 surfaces are classified by a pair of modular invariants, in the same manner that elliptic curves over…

Algebraic Geometry · Mathematics 2007-05-23 Adrian Clingher , Charles F. Doran