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Let G be a Lie group and g its Lie algebra. We develop a theory of quasi Poisson structures relative to a not necessarily non-degenerate Ad-invariant symmetric 2-tensor in the tensor square of g and one of general not necessarily…

Differential Geometry · Mathematics 2026-01-22 Johannes Huebschmann

This paper is a survey on the role of Higgs bundle theory in the study of higher Teichm\"uller spaces. Recall that the Teichm\"uller space of a compact surface can be identified with a certain connected component of the moduli space of…

Algebraic Geometry · Mathematics 2019-01-29 Oscar García-Prada

We have studied irreducible Hom-Lie algebroid connections for Hom-bundle and prove that the H-gauge theoretic moduli space has a Hausdorff Hilbert manifold structure. This work generalizes some known results about simple semi-connections…

Differential Geometry · Mathematics 2025-05-20 Ayush Jaiswal

We carry an intrinsic approach to the study of the connectedness of the moduli space $\mathcal{M}_G$ of $G$-Higgs bundles, over a compact Riemann surface, when $G$ is a complex reductive (not necessarily connected) Lie group. We prove that…

Algebraic Geometry · Mathematics 2018-02-22 Oscar García-Prada , André Oliveira

A holomorphic triple over a compact Riemann surface consists of two holomorphic vector bundles and a holomorphic map between them. After fixing the topological types of the bundles and a real parameter, there exist moduli spaces of stable…

Algebraic Geometry · Mathematics 2016-09-07 Steven B. Bradlow , Oscar Garcia-Prada , Peter B. Gothen

Let X be a compact Riemann surface together with a finite set of marked points. We use Morse theoretic techniques to compute the Betti numbers of the parabolic U(2,1)-Higgs bundles moduli spaces over X. We give examples for one marked point…

Algebraic Geometry · Mathematics 2007-05-23 Marina Logares

We construct spaces of coinvariants at principally polarized abelian varieties with respect to the action of an infinite-dimensional Lie algebra. We show how these spaces globalize to twisted $\mathcal{D}$-modules on moduli of principally…

Algebraic Geometry · Mathematics 2024-05-30 Nicola Tarasca

We provide an explicit algebraic construction for the pullback and direct image of parabolic bundles, parabolic Higgs bundles and parabolic connections through maps between Riemann surfaces. We show that these constructions preserve…

Algebraic Geometry · Mathematics 2024-04-05 David Alfaya , Indranil Biswas

In this paper we continue our study on the moduli spaces of flat G-bundles, for any semi-simple Lie group G, over a Riemann surface by using heat kernel and Reidemeister torsion. Formulas for intersection numbers on the moduli spaces over a…

dg-ga · Mathematics 2008-02-03 Kefeng Liu

In this paper, we study rank 2 (quasi) parabolic bundles over the Riemann sphere with an effective divisor and these moduli spaces. First we consider a criterium when a parabolic bundle admits a unramified irregular singular parabolic…

Algebraic Geometry · Mathematics 2022-10-14 Arata Komyo , Frank Loray , Masa-Hiko Saito

The aim of this paper is to construct the parabolic version of the Donaldson--Uhlenbeck compactification for the moduli space of parabolic stable bundles on an algenraic surface with parabolic structures along a divisor with normal crossing…

Algebraic Geometry · Mathematics 2007-05-23 V. Balaji , A. Dey , R. Parthasarathi

We propose a new moduli-theoretic approach to the $p$-adic Simpson correspondence for a smooth proper rigid space $X$ over $\mathbb C_p$ with coefficients in any rigid analytic group $G$, in terms of a comparison of moduli stacks. For its…

Algebraic Geometry · Mathematics 2024-02-08 Ben Heuer

By means of a certain exact non-abelian duality transformation, we show that there is a natural embedding, dense in the sense of the distributions in the large-N limit, of parabolic Higgs bundles of rank N on a fiber two-dimensional torus…

High Energy Physics - Theory · Physics 2011-04-15 Marco Bochicchio

In this paper we count the number of isomorphism classes of geometrically indecomposable quasi-parabolic structures of a given type on a given vector bundle on the projective line over a finite field. We give a conjectural cohomological…

Algebraic Geometry · Mathematics 2016-09-19 Emmanuel Letellier

Through the action of anti-holomorphic involutions on a compact Riemann surface, we construct families of (A,B,A)-branes in the moduli spaces of G_c-Higgs bundles on the Riemann surface. We study the geometry of these (A,B,A)-branes in…

Differential Geometry · Mathematics 2016-03-23 David Baraglia , Laura P. Schaposnik

We construct a relative compactification of Dolbeault moduli spaces of Higgs bundles for reductive algebraic groups on families of projective manifolds that is compatible with the Hitchin morphism.

Algebraic Geometry · Mathematics 2020-03-12 Mark Andrea A. de Cataldo

We show the smoothness over the affine line of the Hodge moduli space of logarithmic t-connections of coprime rank and degree on a smooth projective curve with geometrically integral fibers over an arbitrary Noetherian base. When the base…

Algebraic Geometry · Mathematics 2024-02-21 Mark Andrea A. de Cataldo , Andres Fernandez Herrero

We define the isomonodromic deformation of a Higgs bundle over a compact Riemann surface via the Hitchin-Simpson correspondence and the isomonodromic deformation of a local system. This deformation defines a real analytic section of the…

Algebraic Geometry · Mathematics 2025-11-19 Tianzhi Hu , Mai Shi , Ruiran Sun , Kang Zuo

We provide a construction of the moduli spaces of framed Hitchin pairs and their master spaces. These objects have come to interest as algebraic versions of solutions of certain coupled vortex equations by work of Lin and Stupariu. Our…

Algebraic Geometry · Mathematics 2007-05-23 Alexander Schmitt

This expository paper details the theory of rank one Higgs bundles over a closed Riemann surface X and their relationship to representations of the fundamental group of X. We construct an equivalence between the deformation theories of flat…

Differential Geometry · Mathematics 2011-07-12 William M. Goldman , Eugene Z. Xia