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The minimal model program suggests a compactification of the moduli space of hyperplane arrangements which is a moduli space of stable pairs. Here, a stable pair consists of a scheme X which is a degeneration of projective space and a…

Algebraic Geometry · Mathematics 2007-05-23 Paul Hacking

We construct a new compactification of the moduli space of maps from pointed nonsingular projective stable curves to a nonsingular projective variety with prescribed ramification indices at the points. It is shown to be a proper…

Algebraic Geometry · Mathematics 2011-06-01 Bumsig Kim , Andrew Kresch , Yong-Geun Oh

A new method is presented for solving the Gauss-Codazzi equations for a compact Riemann surface to be immersed in a 3-manifold of constant curvature. In the negative curvature case, the moduli for such embeddings are cohomology classes of…

Differential Geometry · Mathematics 2007-05-23 Alexandre C. Goncalves , Karen K. Uhlenbeck

The moduli space of holomorphic fiber bundles ${\cal M}_n(\Si)$ over a compact Riemann surface $\Si$ is considered. A formula for the regularised determinant and an other for the symplectic form at trivial bundle are proposed.

Differential Geometry · Mathematics 2016-09-07 Antoine Balan

We describe moduli spaces of invariant generalized complex structures and moduli spaces of invariant generalized K\"ahler structures on maximal flag manifolds under $B$-transformations. We give an alternative description of the moduli space…

Differential Geometry · Mathematics 2023-04-20 Elizabeth Gasparim , Fabricio Valencia , Carlos Varea

Let M be a meromorphic connection with poles along a smooth divisor D in a smooth algebraic variety. Let Sol M be the solution complex of M. We prove that the good formal decomposition locus of M coincides with the locus where the…

Algebraic Geometry · Mathematics 2019-03-20 Jean-Baptiste Teyssier

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 mostly expository paper we review several known results about the cohomology of moduli spaces of smooth and stable curves, focusing in particular on low degree cohomology. We also give a new proof of Harer's theorem describing the…

Algebraic Geometry · Mathematics 2008-12-19 Enrico Arbarello , Maurizio Cornalba

The moduli space of holomorphic maps from Riemann surfaces to the Grassmannian is known to have two kinds of compactifications: Kontsevich's stable map compactification and Marian-Oprea-Pandharipande's stable quotient compactification. Over…

Algebraic Geometry · Mathematics 2019-02-20 Yukinobu Toda

In this thesis I give a new description for the moduli space of stable n pointed curves of genus zero and explicitly specify a natural isomorphism and inverse between them that preserves many important properties. I also give a natural…

Algebraic Topology · Mathematics 2022-05-17 Daniel Singh

Let $X$ be a smooth projective curve of genus $g\geq 2$ over the complex numbers. Fix $n\geq 2$, and an integer $d$. A pair $(E,\phi)$ over $X$ consists of an algebraic vector bundle $E$ of rank $n$ and degree $d$ over $X$ and a section…

Algebraic Geometry · Mathematics 2009-04-14 Vicente Muñoz

In this article we give a survey of homology computations for moduli spaces $\mathfrak{M}_{g,1}^m$ of Riemann surfaces with genus $g\geqslant 0$, one boundary curve, and $m\geqslant 0$ punctures. While rationally and stably this question…

Algebraic Topology · Mathematics 2022-09-20 Carl-Friedrich Bödigheimer , Felix Boes , Florian Kranhold

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

We study the moduli space of A-infinity structures on a topological space as well as the moduli space of A-infinity-ring structures on a fixed module spectrum. In each case we show that the moduli space sits in a homotopy fiber sequence in…

Algebraic Topology · Mathematics 2014-11-04 John R. Klein , Sean Tilson

A well-known property of unordered configuration spaces of points (in an open, connected manifold) is that their homology stabilises as the number of points increases. We generalise this result to moduli spaces of submanifolds of higher…

Algebraic Topology · Mathematics 2021-08-18 Martin Palmer

We study the moduli space of solutions to the Seiberg-Witten equations with $N$ spinors on a compact Riemann surface. These moduli spaces arise in a program to define a new enumerative invariant of 3-manifolds. They are also of independent…

Differential Geometry · Mathematics 2025-05-20 Ollie Thakar

We analyse the moduli space and the structure of noncommutative 3-spheres. We develop the notion of central quadratic form for quadratic algebras, and prove a general algebraic result which considerably refines the classical homomorphism…

Quantum Algebra · Mathematics 2009-11-10 Alain Connes , Michel Dubois-Violette

We introduce the notion of stable orbifold projective curves, and show that the moduli stack of stable orbifold projective curves is isomorphic to the moduli stack of weighted pointed stable curves in the sense of Hassett with respect to…

Algebraic Geometry · Mathematics 2024-01-29 Tarig Abdelgadir , Daniel Chan , Shinnosuke Okawa , Kazushi Ueda

For any finite abelian group G, we study the moduli space of abelian $G$-covers of elliptic curves, in particular identifying the irreducible components of the moduli space. We prove that, in the totally ramified case, the moduli space has…

Algebraic Geometry · Mathematics 2015-06-01 Nicola Pagani

We give a proof of the Gromov compactness theorem using the language of stable curves (i.e. cusp-curve of Gromov, or stable maps of Kontsevich and Manin) in general setting: An almost complex structure on a target manifold is only…

Differential Geometry · Mathematics 2016-09-07 S. Ivashkovich , V. Shevchishin