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We show that the moduli space of marked branched projective structures of genus g and branching degree n is a complex analytic space. In the case g > 1 we show that this moduli space is of dimension 6 g - 6 + n and we characterize its…

Algebraic Geometry · Mathematics 2023-11-17 Gustave Billon

Let k be an algebraically closed field of characteristic p>0. We compute the Weyl filtration multiplicities in indecomposable tilting modules and the decomposition numbers for the general linear group over k in terms of cap diagrams under…

Representation Theory · Mathematics 2023-01-09 Rudolf Tange

For more than hundred years, various concepts were developed to understand the fields of geometric objects and invariant differential operators between them for conformal Riemannian and projective geometries. More recently, several general…

Differential Geometry · Mathematics 2023-02-07 Andreas Cap , Jan Slovak

We investigate the electromagnetic duality properties of an abelian gauge theory on a compact oriented four-manifold by analysing the behaviour of a generalised partition function under modular transformations of the dimensionless coupling…

High Energy Physics - Theory · Physics 2008-11-26 David I. Olive , Marcos Alvarez

In this paper we develop a general theory of modules which are invariant under automorphisms of their covers and envelopes. When applied to specific cases like injective envelopes, pure-injective envelopes, cotorsion envelopes, projective…

Rings and Algebras · Mathematics 2014-04-29 Pedro A. Guil Asensio , Derya Keskin Tütüncü , Ashish K. Srivastava

We discuss selected topics on the topology of moduli spaces of curves and maps, emphasizing their relation with Gromov--Witten theory and integrable systems.

Algebraic Geometry · Mathematics 2008-09-12 Y. -P. Lee , R. Vakil

We find the generators of the fields of invariants of the coadjoint action of the unitriangular group on the basic varieties and basic cells. It is proved that the transcendental degree of the field of invariants on a basic cell coincides…

Representation Theory · Mathematics 2014-07-22 A. N. Panov

Let $\Sigma$ be a closed surface, $G$ a compact Lie group, with Lie algebra $g$, $\xi \colon P \to \Sigma$ a principal $G$-bundle, let $N(\xi)$ denote the moduli space of central Yang-Mills connections on $\xi$, for suitably chosen…

dg-ga · Mathematics 2008-02-03 Johannes Huebschmann

In the present notes we generalize the classical work of Demazure [Invariants sym\'etriques entiers des groupes de Weyl et torsion] to arbitrary oriented cohomology theories and formal group laws. Let G be a split semisemiple linear…

Algebraic Geometry · Mathematics 2013-02-27 Baptiste Calmès , Victor Petrov , Kirill Zainoulline

We obtain Gabor frame characterisations of modulation spaces defined via a class of translation-modulation invariant Banach spaces of distributions that was recently introduced in $[10]$. We show that these spaces admit an atomic…

Functional Analysis · Mathematics 2021-02-08 Andreas Debrouwere , Bojan Prangoski

We construct a geometrically compactified moduli algebraic space of Kahler-Einstein Fano manifolds.

Algebraic Geometry · Mathematics 2015-04-28 Yuji Odaka

We collect the recent results on invariant f-structures in the generalized Hermitian geometry. Here the canonical f-structures on homogeneous k-symmetric spaces play a remarkable role. Specifically, these structures provide a wealth of…

Differential Geometry · Mathematics 2007-05-23 Vitaly V. Balashchenko

We study the structure of the supersymmetric moduli spaces of ${\cal N}=1$ and ${\cal N}=2$ supergravity theories in $AdS_4$ backgrounds. In the ${\cal N}=1$ case, the moduli space cannot be a complex submanifold of the K\"ahler field…

High Energy Physics - Theory · Physics 2015-06-18 Senarath de Alwis , Jan Louis , Liam McAllister , Hagen Triendl , Alexander Westphal

Studied are moduli spaces of self dual or anti-self dual connections on noncommutative 4-manifolds, especially deformation quantization of compact spin Riemannian 4-manifolds and their isometry groups have 2-torus subgroup. Then such moduli…

Differential Geometry · Mathematics 2007-05-23 Hiroshi Takai

We show that the moduli space of semistable G-bundles on an elliptic curve for a reductive group G is isomorphic to a power of the elliptic curve modulo a certain Weyl group which depend on the topological type of the bundle. This…

Algebraic Geometry · Mathematics 2020-02-07 Dragoş Frăţilă

We continue the study of linear families of contact forms on 3-manifolds begun in our paper `Contact geometry and complex surfaces'. The present paper introduces Teichmuller and moduli spaces for so-called taut contact circles. By…

Symplectic Geometry · Mathematics 2007-05-23 Hansjörg Geiges , Jesús Gonzalo

When N= D=11 supergravity is compactified on CY threefold to N=2 D=5 supergravity the action of the last is given in terms of the geometery of the CY manifold space, namely, in terms of the hypermultiplets. There are $z^i(i=1,...,h^{2,1})$…

General Relativity and Quantum Cosmology · Physics 2022-05-02 Safinaz Salem , Moataz H. Emam , H. H. Salah

Let K be a compact semi-simple Lie group. We classify K-invariant Kaehler structures on the space Kc/(P,P), where Kc is the complexification of K, P is a parabolic subgroup of Kc, and (P,P) the commutator subgroup. For each Kaehler…

dg-ga · Mathematics 2008-02-03 Meng-Kiat Chuah

This paper is dedicated to the study of deformations of coassociative 4-folds in a G_2 manifold which have conical singularities. We stratify the types of deformations allowed into three problems. The main result for each problem states…

Differential Geometry · Mathematics 2008-05-20 Jason Lotay

We analyse the geometry of generic Minkowski $\mathcal{N}=1$, $D=4$ flux compactifications in string theory, the default backgrounds for string model building. In M-theory they are the natural string theoretic extensions of $\mathrm{G}_2$…

High Energy Physics - Theory · Physics 2022-02-04 Anthony Ashmore , Charles Strickland-Constable , David Tennyson , Daniel Waldram