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The present article studies the class of Einstein-Hermitian harmonic maps of constant Kaehler angle from the projective line into quadrics. We provide a description of their moduli spaces up to image, and gauge-equivalence using the…

Differential Geometry · Mathematics 2017-05-19 Oscar Macia , Yasuyuki Nagatomo

We study left-invariant locally conformally K\"ahler structures on Lie groups, or equivalently, on Lie algebras. We give some properties of these structures in general, and then we consider the special cases when its complex structure is…

Differential Geometry · Mathematics 2020-04-06 Adrián Andrada , Marcos Origlia

Given a semisimple, compact, connected Lie group G with complexification G^c, we show there is a stable range in the homotopy type of the universal moduli space of flat connections on a principal G-bundle on a closed Riemann surface, and…

Algebraic Topology · Mathematics 2008-01-23 Ralph L. Cohen , Soren Galatius , Nitu Kitchloo

The existence of some complex geometrical structures on a compact manifold such as complex structures, Kaehler (pseudo-Kaehler) structures often impose certain restrictions on its underling topological or differentiable manifold. In this…

Complex Variables · Mathematics 2016-01-15 Keizo Hasegawa

We construct projective asymptotically good moduli spaces parametrizing boundary polarized CY surface pairs, which are projective slc Calabi-Yau pairs $(X,D)$ such that $D$ is ample and $X$ has dimension two. The moduli space provides a…

Algebraic Geometry · Mathematics 2024-07-02 Harold Blum , Yuchen Liu

We construct the hyper-K\"ahler moduli space of framed monopoles over $\mathbb{R}^3$ for any connected, simply connected, compact, semisimple Lie group and arbitrary mass and charge, and hence symmetry breaking. In order to do so, we define…

Differential Geometry · Mathematics 2024-08-07 Jaime Mendizabal

Let $(X,\omega)$ be a symplectic manifold, $J$ be an $\omega$-tame almost complex structure, and $L$ be a Lagrangian submanifold. The stable compactification of the moduli space of parametrized $J$-holomorphic curves in $X$ with boundary in…

Symplectic Geometry · Mathematics 2007-05-23 Chiu-Chu Melissa Liu

We describe some results on moduli space of logarithmic connections equipped with framings on a $n$-pointed compact Riemann surface.

Algebraic Geometry · Mathematics 2021-03-24 Indranil Biswas , Michi-aki Inaba , Arata Komyo , Masa-Hiko Saito

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 construct (in significant generality) moduli spaces representing the functor of morphisms from a scheme into a solvable algebraic group.

Algebraic Geometry · Mathematics 2023-11-13 Zev Rosengarten

We study the local structure of the singularity in the moduli space of sheaves on a K3 surface which has been resolved by K O'Grady in his construction of new examples of hyperkaehler manifolds. In particular, we identify the singularity…

Algebraic Geometry · Mathematics 2007-05-23 D. Kaledin , M. Lehn

Maulik and Ranganathan have recently introduced moduli spaces of logarithmic stable pairs. We examine the theory in the case of toric surfaces, and recast the theory in this case using three ingredients: Gelfand, Kapranov and Zelevinsky…

Algebraic Geometry · Mathematics 2023-02-17 Patrick Kennedy-Hunt

We exhibit the first non-trivial concrete examples of Gromov-Hausdorff compactifications of moduli spaces of K\"ahler-Einstein Fano manifolds in all complex dimensions bigger than two (Fano K-moduli spaces). We also discuss potential…

Differential Geometry · Mathematics 2017-05-02 Cristiano Spotti , Song Sun

In this paper, we consider the versal deformations of three dimensional Lie algebras. We classify Lie algebras and study their deformations by using linear algebra techniques to study the cohomology. We will focus on how the deformations…

Quantum Algebra · Mathematics 2007-05-23 Carolyn Otto , Michael Penkava

We give some concrete examples of moduli spaces of connections. Precisely, we explain how to explicitly construct the moduli spaces of rank 2 fuchsian systems and logarithmic connections on the Riemann sphere with 4 poles. The former ones…

Classical Analysis and ODEs · Mathematics 2015-03-24 Frank Loray

We determine the quantum cohomology of the moduli space of odd degree rank two stable vector bundles over a Riemann surface $\Sigma$ of any genus. This work together with dg-ga/9710029 prove that this quantum cohomology is isomorphic to the…

alg-geom · Mathematics 2007-05-23 Vicente Muñoz

The moduli spaces refered to are topological spaces whose path components parametrize homotopy types. Such objects have been studied in two separate contexts: rational homotopy types, in the work of several authors in the late 1970's; and…

Algebraic Topology · Mathematics 2007-05-23 David Blanc

This work deals with the topological classification of germs of singular foliations on $(\mathbb C^{2},0)$. Working in a suitable class of foliations we fix the topological invariants given by the separatrix set, the Camacho-Sad indices and…

Dynamical Systems · Mathematics 2017-09-19 David Marín , Jean-François Mattei , Éliane Salem

This informal note provides some elementary examples to motivate the local structural results of [1] on the moduli space of genus one stable maps to projective space. The hope is that these examples will be helpful for graduate students to…

Algebraic Geometry · Mathematics 2011-06-16 Yi Hu

In this paper, we prove an existence theorem of a local moduli space for geometric structures in a very general setting. Then to show the interest of this result, we apply it to the case of sasakian and Sasaki-Einstein structures.

Differential Geometry · Mathematics 2015-10-19 Laurent Meersseman , Marcel Nicolau
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