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It is in general unknown which topological complex vector bundles on a non-algebraic surface admit holomorphic structures. We solve this problem for primary Kodaira surfaces by using results of Kani on curves of genus two with elliptic…

Complex Variables · Mathematics 2013-11-21 Marian Aprodu , Vasile Brinzanescu , Matei Toma

This note is but a research announcement, summarizing and explaining results proven and detailed in forthcoming papers. When one studies families of objects over curves, and the objects are parametrized by a Deligne-Mumford stack M, then…

Algebraic Geometry · Mathematics 2007-05-23 Dan Abramovich , Angelo Vistoli

It is shown that moduli spaces of complete families of compact complex hypersurfaces in complex manifolds often come equipped canonically with projective structures satisfying some natural integrability conditions.

dg-ga · Mathematics 2008-02-03 Sergey Merkulov , Henrik Pedersen

In this paper we study the moduli space of standard holomorphic structures on a noncommutative complex two torus. It will be shown that the moduli space is naturally identified with the moduli space of stable bundles on an elliptic curve.…

Quantum Algebra · Mathematics 2007-05-23 Eunsang Kim , Hoil Kim

A theorem of Kuranishi tells us that the moduli space of complex structures on any smooth compact manifold is always locally a finite-dimensional space. Globally, however, this is simply not true; we display examples in which the moduli…

Complex Variables · Mathematics 2017-02-15 Claude LeBrun

Kuranishi structures were introduced in the 1990s by Fukaya and Ono for the purpose of assigning a virtual cycle to moduli spaces of pseudoholomorphic curves that cannot be regularized by geometric methods. Their core idea was to build such…

Symplectic Geometry · Mathematics 2015-08-12 Dusa McDuff , Katrin Wehrheim

Let $M$ be a super Riemann surface with holomorphic distribution $\mathcal{D}$ and $N$ a symplectic manifold with compatible almost complex structure $J$. We call a map $\Phi\colon M\to N$ a super $J$-holomorphic curve if its differential…

Differential Geometry · Mathematics 2022-04-22 Enno Keßler , Artan Sheshmani , Shing-Tung Yau

This paper describes the structure of the moduli space of holomorphic curves and constructs Gromov Witten invariants in the category of exploded manifolds. This includes defining Gromov Witten invariants relative to normal crossing divisors…

Symplectic Geometry · Mathematics 2011-02-02 Brett Parker

We develop a theory of complex Kuranishi structures on projective schemes. These are sufficiently rigid to be equivalent to weak perfect obstruction theories, but sufficiently flexible to admit global complex Kuranishi charts. We apply the…

Algebraic Geometry · Mathematics 2024-03-05 Jeongseok Oh , Richard P. Thomas

Log-symplectic structures are Poisson structures that are determined by a symplectic form with logarithmic singularities. We construct moduli spaces of curves with values in a log-symplectic manifold. Among the applications, we classify…

Symplectic Geometry · Mathematics 2018-05-16 Davide Alboresi

We compute the stable cohomology of moduli spaces of hyperelliptic curves of a fixed genus embedded on a fixed Hirzebruch surface. We also describe these moduli spaces of embedded hyperelliptic curves in terms of moduli spaces of pointed…

Algebraic Geometry · Mathematics 2025-08-11 Jonas Bergström , Angelina Zheng

We introduce the tautological rings of moduli stacks of twisted curves and establish some basic properties.

Algebraic Geometry · Mathematics 2025-10-02 Hsian-Hua Tseng

This is an expository article on the theory of Kuranishi structure and is based on a series of pdf files we uploaded for the discussion of the google group named `Kuranishi' (with its administrator H. Hofer). There we replied to several…

Symplectic Geometry · Mathematics 2012-09-21 Kenji Fukaya , Yong-Geun Oh , Hiroshi Ohta , Kaoru Ono

Local normal form theorems for smooth equivariant maps between infinite-dimensional manifolds are established. These normal form results are new even in finite dimensions. The proof is inspired by the Lyapunov-Schmidt reduction for…

Differential Geometry · Mathematics 2021-10-15 Tobias Diez , Gerd Rudolph

We classify holomorphic Cartan geometries on every compact complex curve, and on every compact complex surface which contains a rational curve.

Differential Geometry · Mathematics 2019-11-12 Benjamin McKay

In this work we study the additive orbifold cohomology of the moduli stack of smooth genus g curves. We show that this problem reduces to investigating the rational cohomology of moduli spaces of cyclic covers of curves where the genus of…

Algebraic Geometry · Mathematics 2013-12-20 Nicola Pagani , Orsola Tommasi

We can show that the Kuranishi space of a pair $(M,E)$ of a compact K\"ahler manifold $M$ and its flat Hermitian vector bundle $E$ is isomorphic to the direct product of the Kuranishi space of $M$ and the Kuranishi space of $E$. We study…

Differential Geometry · Mathematics 2025-11-07 Hisashi Kasuya , Valto Purho

The aim of this paper is to study the structure of the higher-dimensional Teichm\"uller and Riemann moduli spaces, viewed as stacks over the category of complex manifolds. We first show that the space of complex operators on a smooth…

Complex Variables · Mathematics 2018-06-19 Laurent Meersseman

This article describes various moduli spaces of pseudoholomorphic curves on the symplectization of a particular overtwisted contact structure on S^1 x S^2. This contact structure appears when one considers a closed self dual form on a…

Geometric Topology · Mathematics 2014-11-11 Clifford Henry Taubes

The goal of this paper is to construct universal cohomology classes on the moduli space of stable bundles over a curve when it is not a fine moduli space, i.e. when the rank and degree are not coprime. More precisely, we show that certain…

Algebraic Geometry · Mathematics 2025-01-22 Donu Arapura