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The Riemann Theorem states, that for any nontrivial connected and simply connected domain on the Riemann sphere there exists some its conformal bijection to the exterior of the unit disk. In this paper we find an explicit form of this map…

Complex Variables · Mathematics 2007-05-23 S. M. Natanzon

Let $X$ be any compact connected Riemann surface of genus $g \geq 3$. For any $r\geq 2$, let $M_X$ denote the moduli space of holomorphic $SL(r,C)$-connections over $X$. It is known that the biholomorphism class of the complex variety $M_X$…

Algebraic Geometry · Mathematics 2008-09-05 Indranil Biswas , Vicente Muñoz

In 1936 H. Lewy showed that the Jacobian determinant of a harmonic homeomorphism between planar domains does not vanish and thus the map is a diffeomorphism. This built on the earlier existence results of Rad\'o and Kneser. R. Shoen and…

Complex Variables · Mathematics 2013-10-21 Gaven J. Martin

In this paper we present a rigidity theorem for locally isometric hypersurfaces with a curvature restriction in de Sitter space. This is an analogue to the case for Riemannian space forms given by Guan and Shen in [5].

Differential Geometry · Mathematics 2020-06-09 Tristan Hasson

We classify holomorphic Cartan geometries on every compact complex curve, and on every compact complex surface which contains a rational curve.

Differential Geometry · Mathematics 2019-11-12 Benjamin McKay

We show that to every maximal surface with conelike singularities in Lorentz-Minkowski space $\mathbb{L}^3$ that can be locally represented as the graph of a smooth function, there exists a corresponding timelike minimal surface in…

Differential Geometry · Mathematics 2019-09-18 Aryaman Patel

This thesis is concerned with the application of operadic methods, particularly modular operads, to questions arising in the study of moduli spaces of surfaces as well as applications to the study of homotopy algebras and new constructions…

Geometric Topology · Mathematics 2012-09-06 Christopher Braun

In this note we discuss the geometry of Riemannian surfaces having a discrete set of singular points. We assume the conformal structure extends through the singularities and the curvature is integrable. Such points are called \emph{simple…

Differential Geometry · Mathematics 2022-01-11 Marc Troyanov

A conformal map from a Riemann surface to a Euclidean space of dimension greater than or equal to three is explained by using the Clifford algebra, in a similar fashion to quaternionic holomorphic geometry of surfaces in the Euclidean…

Differential Geometry · Mathematics 2019-08-16 Katsuhiro Moriya

We show for a certain class of operators $A$ and holomorphic functions $f$ that the functional calculus $A\mapsto f(A)$ is holomorphic. Using this result we are able to prove that fractional Laplacians $(1+\Delta^g)^p$ depend real…

Differential Geometry · Mathematics 2023-12-08 Martin Bauer , Martins Bruveris , Philipp Harms , Peter W. Michor

By exploring the consequences of the triviality of the monodromy group for a class of surfaces of which the mixed Hodge structure is pure, we extend results of Miyanishi and Sugie, Dimca, Zaidenberg and Kaliman.

Algebraic Geometry · Mathematics 2015-07-07 A. J. Parameswaran , M. Tibar

We generalize the classical de Rham decomposition theorem for Riemannian manifolds to the setting of geodesic metric spaces of finite dimension.

Metric Geometry · Mathematics 2007-05-23 Thomas Foertsch , Alexander Lytchak

We compute the automorphism groups of the Dolbeault, de Rham and Betti moduli spaces for the multiplicative group ${\mathbb C}^*$ associated to a compact connected Riemann surface.

Algebraic Geometry · Mathematics 2016-01-21 David Baraglia , Indranil Biswas , Laura P. Schaposnik

Starting from suitable tableaux over finite dimensional Lie algebras, we provide a scheme for producing involutive linear Pfaffian systems related to various classes of submanifolds in homogeneous spaces which constitute integrable systems.…

Differential Geometry · Mathematics 2007-12-06 Emilio Musso , Lorenzo Nicolodi

The paper contains an application of van Kampen theorem for groupoids for computation of homotopy types of certain class of non-compact foliated surfaces obtained by gluing at most countably many strips $\mathbb{R}\times(0,1)$ with boundary…

Algebraic Topology · Mathematics 2021-12-07 Sergiy Maksymenko , Oleksii Nikitchenko

The purpose of this note is to give an (esentially optimal) effective version of Matsusaka's Big theorem for smooth projective surfaces.

alg-geom · Mathematics 2008-02-03 Guillermo Fernández del Busto

In this paper we study the topology of the spaces Hol(M,P{n},k) of (basepoint preserving) holomorphic maps of a given degree k from a Riemann surface M of genus g>0 into the n-th complex projective space P{n}, n>0. Using symmetric products…

alg-geom · Mathematics 2007-05-23 S. Kallel , R. J. Milgram

We show that any two holomorhpic maps, not both of which are constant, from a generalized Hopf manifold to its base must have a coincidence. We prove a similar result for holomorphic maps from a generalized Calabi-Eckmann manifold.

Complex Variables · Mathematics 2007-05-23 Parameswaran Sankaran

The measurable Riemann mapping theorem proved by Morrey and in some particular cases by Ahlfors, Lavrentiev and Vekua, says that any measurable almost complex structure on $\rd$ ($S^2$) with bounded dilatation is integrable: there is a…

Complex Variables · Mathematics 2007-05-23 Alexey Glutsyuk

Let X and X' be compact Riemann surfaces of genus at least three. Let G and G' be nontrivial connected semisimple linear algebraic groups over C. If some components $M_{DH}^d(X,G)$ and $M_{DH}^{d'}(X',G')$ of the associated Deligne--Hitchin…

Algebraic Geometry · Mathematics 2012-03-01 Indranil Biswas , Tomás L. Gómez , Norbert Hoffmann
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