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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 the moduli space of M-theories compactified on G_2 manifolds which are asymptotic to a cone over quotients of S^3 x S^3. We show that the moduli space is composed of several components, each of which interpolates smoothly among…

High Energy Physics - Theory · Physics 2010-11-19 Tamar Friedmann

A moduli space of stable quotients of the rank n trivial sheaf on stable curves is introduced. Over nonsingular curves, the moduli space is Grothendieck's Quot scheme. Over nodal curves, a relative construction is made to keep the torsion…

Algebraic Geometry · Mathematics 2014-11-11 A. Marian , D. Oprea , R. Pandharipande

We consider the moduli space $\mathfrak{M}_{g,n}$ of Riemann surfaces of genus $g\ge0$ with $n\ge1$ ordered and directed marked points. For $d\ge 2g+n-1$ we show that $\mathfrak{M}_{g,n}$ is homotopy equivalent to a component of the…

Algebraic Topology · Mathematics 2023-08-01 Andrea Bianchi

Symplectic and Poisson structures of certain moduli spaces/Huebschmann,J./ Abstract: Let $\pi$ be the fundamental group of a closed surface and $G$ a Lie group with a biinvariant metric, not necessarily positive definite. It is shown that a…

High Energy Physics - Theory · Physics 2008-02-03 Johannes Huebschmann

In this article, we consider certain irreducible subvarieties of the moduli space of compact Riemann surfaces determined by the specification of actions of finite groups. We address the general problem of determining which among them are…

Algebraic Geometry · Mathematics 2024-07-31 Rubén A. Hidalgo , Jennifer Paulhus , Sebastián Reyes-Carocca , Anita M. Rojas

After a general discussion of group actions, orbifolds, and "weak orbifolds" this note will provide elementary introductions to two basic moduli spaces over the real or complex numbers: First the moduli space of effective divisors with…

Algebraic Geometry · Mathematics 2021-02-23 Araceli Bonifant , John Milnor

Let (G, \mu) be a pair of a reductive group G over the p-adic integers and a minuscule cocharacter {\mu} of G defined over an unramified extension. We introduce and study "(G, \mu)-displays" which generalize Zink's Witt vector displays. We…

Algebraic Geometry · Mathematics 2018-05-14 O. Bueltel , G. Pappas

In this survey article we describe moduli spaces of simple, stable, and semistable sheaves on K3 surfaces, following the work of Mukai, O'Grady, Huybrechts, Yoshioka, and others. We also describe some recent developments, including…

Algebraic Geometry · Mathematics 2021-12-28 Justin Sawon

Let M and N be even-dimensional oriented real manifolds, and $u:M \to N$ be a smooth mapping. A pair of complex structures at M and N is called u-compatible if the mapping u is holomorphic with respect to these structures. The quotient of…

Differential Geometry · Mathematics 2007-05-23 Yurii M. Burman

Refinements of the Yang-Mills stratifications of spaces of connections over a compact Riemann surface are investigated. The motivation for this study was the search for a complete set of relations between the standard generators for the…

Algebraic Geometry · Mathematics 2007-05-23 Frances Kirwan

This is a note in which we first review symmetries of moduli spaces of stable meromorphic connections on trivial vector bundles over the Riemann sphere, and next discuss symmetries of their integrable deformations as an application. In the…

Classical Analysis and ODEs · Mathematics 2018-03-16 Kazuki Hiroe

We construct a moduli space for Riemann surfaces that is universal in the sense that it represents compact Riemann surfaces of any finite genus. This moduli space is stratifed according to genus, and it carries a metric and a measure that…

Algebraic Geometry · Mathematics 2017-02-01 Lizhen Ji , Juergen Jost

We define a type of modulus $\operatorname{dMod}_p$ for Lipschitz surfaces based on $L^p$-integrable measurable differential forms, generalizing the vector modulus of Aikawa and Ohtsuka. We show that this modulus satisfies a homological…

Differential Geometry · Mathematics 2025-05-16 Ilmari Kangasniemi , Eden Prywes

We prove that the Picard group of the moduli space of semistable G-bundles on any irreducible smooth projective curve is isomorphic with the group of integers.

alg-geom · Mathematics 2008-02-03 Shrawan Kumar , M. S. Narasimhan

Using the $L^2$-norm of the Higgs field as a Morse function, we count the number of connected components of the moduli space of parabolic $U(p,q)$-Higgs bundles over a Riemann surface with a finite number of marked points, under certain…

Algebraic Geometry · Mathematics 2008-01-28 Oscar Garcia-Prada , Marina Logares , Vicente Muñoz

We show that moduli spaces of transversely cut-out (perturbed) pseudo-holomorphic curves in an almost complex manifold carry canonical relative smooth structures ("relative to the moduli space of domain curves"). The main point is that…

Symplectic Geometry · Mathematics 2020-10-01 Mohan Swaminathan

There is a canonical identification, due to the author, of a convex real projective structure on an orientable surface of genus g and a pair consisting of a conformal structure together with a holomorphic cubic differential on the surface.…

Differential Geometry · Mathematics 2007-05-23 John C. Loftin

In this manuscript, we aim to classify and characterize the moduli space of homogeneous spin connections and homogeneous SU(2) connections on three-dimensional Riemannian homogeneous spaces. An analysis of the topology of the associated…

Mathematical Physics · Physics 2025-09-23 Matteo Bruno , Gabriele Peluso

We shall prove that a moduli space of flat irreducible Lie algebroid connections over a compact manifold has locally a natural structure of a smooth differentiable space. This is a generalization of some well known results for the moduli…

Differential Geometry · Mathematics 2010-12-16 Libor Křižka