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Related papers: A characterization of Inoue surfaces

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In this paper we describe the notion of an annular end of a Riemann surface being of finite type with respect to some harmonic function and prove some theoretical results relating the conformal structure of such an annular end to the level…

Differential Geometry · Mathematics 2016-03-30 William H. Meeks , Joaquin Perez

This paper is about a generalization of famous Inoue's surfaces. Let $M$ be a matrix in $SL(2n+1,\mathbb{Z})$ having only one real eigenvalue which is simple. We associate to $M$ a complex manifold $T_M$ of complex dimension $n+1$. This…

Differential Geometry · Mathematics 2019-03-20 Hisaaki Endo , Andrei Pajitnov

The paper contains a review on recent progress in the deformational properties of smooth maps from compact surfaces $M$ to a one-dimensional manifold $P$. It covers description of homotopy types of stabilizers and orbits of a large class of…

Geometric Topology · Mathematics 2024-04-22 Sergiy Maksymenko

In each characteristic $p\neq 2, 3$, it was shown in a previous work that the order of an automorphism of a K3 surface is bounded by 66, if finite. Here, it is shown that in each characteristic $p\neq 2, 3$ a K3 surface with a cyclic action…

Algebraic Geometry · Mathematics 2014-03-11 JongHae Keum

The number of singularities, counted with multiplicity, of a generic codimension one holomorphic distribution on a compact toric orbifold is determined. As a consequence, we give the classification of regular distributions on rational…

Complex Variables · Mathematics 2024-02-28 Miguel Rodríguez Peña

We give a short, mostly elementary and self-contained proof of the classical result that the groups of diffeomorphisms, homeomorphisms, and homotopy equivalences of a surface have the same group of connected components.

General Topology · Mathematics 2009-08-18 Søren Kjærgaard Boldsen

The fine 1-curve graph of a surface is a graph whose vertices are simple closed curves on the surface and whose edges connect vertices that intersect in at most one point. We show that the automorphism group of the fine 1-curve graph is…

Geometric Topology · Mathematics 2023-09-29 Katherine Williams Booth , Daniel Minahan , Roberta Shapiro

We study the topological properties of the leaves of the singular foliation induced by a closed 1-form of Morse type on a compact orbifold. In particular, we establish criteria that characterize when all such leaves are compact, when they…

Differential Geometry · Mathematics 2026-04-06 Daniel Lopez Garcia , Fabricio Valencia

It is proved that harmonic functions are characterized by harmonicity of their spherical means, for which purpose the iterated spherical means are used. The similar characterization of solutions to the modified Helmholtz equation…

Analysis of PDEs · Mathematics 2021-10-12 Nikolay Kuznetsov

We review how some multianalytic inner functions of the Beurling type theorem are associated to row contractions following works of G.Popescu. Motivated by a result on weak Markov dilations, we define a notion of characteristic function for…

Operator Algebras · Mathematics 2009-03-30 Santanu Dey

We classify compact homogeneous geometries of irreducible spherical type and rank at least 2 which admit a transitive action of a compact connected group, up to equivariant 2-coverings. We apply our classification to polar actions on…

Group Theory · Mathematics 2014-04-17 Linus Kramer , Alexander Lytchak

We prove some general results concerning the size of the group of automorphisms of the Douady space of points on a surface. We then study some properties of the automorphisms coming from an automorphism of the surface, in particular their…

Algebraic Geometry · Mathematics 2009-05-28 Samuel Boissiere

We study slopes of finite cyclic covering fibrations of a fibered surface. We give the best possible lower bound of the slope of these fibrations. We also give the slope equality of finite cyclic covering fibrations of a ruled surface and…

Algebraic Geometry · Mathematics 2016-04-19 Makoto Enokizono

We classify complete biharmonic surfaces with parallel mean curvature vector field and non-negative Gaussian curvature in complex space forms.

Differential Geometry · Mathematics 2016-02-10 Dorel Fetcu , Ana Lucia Pinheiro

Embedded minimal surfaces of finite total curvature in $\mathbb{R}^3$ are reasonably well understood: From far away, they look like intersecting catenoids and planes, suitably desingularized. We consider the larger class of harmonic…

Differential Geometry · Mathematics 2014-07-11 Peter Connor , Kevin Li , Matthias Weber

Classically, isothermic surfaces are characterized as those surfaces which are "divisible into infinitesimal squares by their curvature lines". This characterization is the direct analogue to the definition of discrete isothermic nets. In…

dg-ga · Mathematics 2008-02-03 Udo Hertrich-Jeromin

In this paper, we briefly review some of the known results concerning the cohomological structures of the mapping class group of surfaces, the outer automorphism group of free groups, the diffeomorphism group of surfaces as well as various…

Geometric Topology · Mathematics 2007-05-23 Shigeyuki Morita

In this note we construct Mabuchi $\mathcal{L}^{{\rm M}}_{\omega}$ functional and Aubin-Yau functionals $\mathcal{I}^{{\rm AY}}_{\omega}, \mathcal{J}^{{\rm AY}}_{\omega}$ on any compact complex surfaces, and establish a number of…

Differential Geometry · Mathematics 2010-03-31 Yi Li

We present and prove a topological characterization of geodesic laminations on hyperbolic surfaces of finite type.

Geometric Topology · Mathematics 2018-05-30 Luis-Miguel Lopez

Let X be a compact complex surface with a real foliation. If all leaves are compact complex curves, the foliation must be holomorphic.

Complex Variables · Mathematics 2007-05-23 Joerg Winkelmann