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The authors prove that for a closed surface of genus at least 3, the graph of pants decompositions has only one end.

几何拓扑 · 数学 2007-05-23 Howard Masur , Saul Schleimer

This paper describes a generalization of decomposition in orbifolds. In general terms, decomposition states that two-dimensional orbifolds and gauge theories whose gauge groups have trivially-acting subgroups decompose into disjoint unions…

高能物理 - 理论 · 物理学 2021-10-28 Daniel Robbins , Eric Sharpe , Thomas Vandermeulen

We will announce two theorems. The first theorem will classify all topological types of degenerate fibers appearing in one-parameter families of Riemann surfaces, in terms of ``pseudoperiodic'' surface homeomorphisms. The second theorem…

复变函数 · 数学 2016-09-06 Yukio Matsumoto , José Mariá Montesinos-Amilibia

We prove unobstructed deformations for compact Kaehlerian even-dimensional Poisson manifolds whose Poisson tensor degenerates along a divisor with mild singularities. Examples include Hilbert schemes of del Pezzo surfaces.

代数几何 · 数学 2016-09-21 Ziv Ran

For every compact Kaehler manifold we give a canonical extension of Griffith's period map to generalized deformations, intended as solutions of Maurer-Cartan equation in the algebra of polyvector fields. Our construction involves the notion…

代数几何 · 数学 2016-02-17 Domenico Fiorenza , Marco Manetti

In this paper, we review or introduce several differential structures on manifolds in the general setting of real and complex differential geometry, and apply this study to Teichm\"uller theory. We focus on bi-Lagrangian i.e. para-K\"ahler…

微分几何 · 数学 2020-08-25 Brice Loustau , Andrew Sanders

We prove that for every compact K\"ahler manifold $X$ there exists an $L$-infinity morphism, lifting the usual cup product in cohomology, from the Kodaira-Spencer differential graded Lie algebra to the suspension of the space of linear…

代数几何 · 数学 2007-05-23 Marco Manetti

In this paper we construct a family of complex structures on a complex flag manifold that converge to the real polarization coming from the Gelfand-Cetlin integrable system, in the sense that holomorphic sections of a prequantum line bundle…

辛几何 · 数学 2011-05-05 Mark D. Hamilton , Hiroshi Konno

Let $M$ be a hyperkaehler manifold, and $\eta$ a closed, positive (1,1)-form which is degenerate everywhere on $M$. We associate to $\eta$ a family of complex structures on $M$, called a degenerate twistor family, and parametrized by a…

代数几何 · 数学 2015-04-06 Misha Verbitsky

This article generalises to K\"ahler orbifolds general results on uniformisation of compact K\"ahler manifolds such as the Shafarevich conjecture for linear fundamental groups.

代数几何 · 数学 2013-02-21 Philippe Eyssidieux

Given a minimal Lagrangian submanifold L in a negative Kaehler--Einstein manifold M, we show that any small Kaehler--Einstein perturbation of M induces a deformation of L which is minimal Lagrangian with respect to the new structure. This…

微分几何 · 数学 2019-09-04 Jason D. Lotay , Tommaso Pacini

We introduce Fenchel-Nielsen coordinates on Teicm\"uller spaces of surfaces of infinite type. The definition is relative to a given pair of pants decomposition of the surface. We start by establishing conditions under which any pair of…

几何拓扑 · 数学 2018-09-25 Daniele Alessandrini , Lixin Liu , Athanase Papadopoulos , Weixu Su , Zongliang Sun

Using the parameterisation of the deformation space of GHMC anti-de Sitter structures on $S \times \mathbb{R}$ by the cotangent bundle of the Teichm\"uller space of $S$, we study how some geometric quantities, such as the Lorentzian…

微分几何 · 数学 2024-12-10 Andrea Tamburelli

We prove two types of results. First we develop the decoupling theory for hypersurfaces with nonzero Gaussian curvature, which extends our earlier work from \cite{BD3}. As a consequence of this we obtain sharp (up to $\epsilon$ losses)…

经典分析与常微分方程 · 数学 2015-09-04 Jean Bourgain , Ciprian Demeter

This paper introduces a novel theoretical framework for identifying Lagrangian Coherent Structures (LCS) in manifolds with non-constant curvature, extending the theory to Finsler manifolds. By leveraging Riemannian and Finsler geometry, we…

We argue that for a smooth surface S, considered as a ramified cover over the projective plane branched over a nodal-cuspidal curve B one could use the structure of the fundamental group of the complement of the branch curve to understand…

代数几何 · 数学 2011-06-29 Michael Friedman , Mina Teicher

In this article we study combinatorial degenerations of minimal surfaces of Kodaira dimension 0 over local fields, and in particular show that the `type' of the degeneration can be read off from the monodromy operator acting on a suitable…

数论 · 数学 2017-01-19 Bruno Chiarellotto , Christopher Lazda

On a compact K\"{a}hler manifold $X$ with a holomorphic 2-form $\a$, there is an almost complex structure associated with $\a$. We show how this implies vanishing theorems for the Gromov-Witten invariants of $X$. This extends the approach,…

辛几何 · 数学 2007-05-23 Junho Lee

We prove long time existence and convergence results for the pluriclosed flow, which imply geometric and topological classification theorems for generalized K\"ahler structures. Our approach centers on the reduction of pluriclosed flow to a…

微分几何 · 数学 2015-02-10 Jeffrey Streets

The main objects of this paper include some degenerate and nonlocal elliptic operators which naturally arise in the conformal invariant theory of Poincar\'e-Einstein manifolds. These operators generally reflect the correspondence between…

微分几何 · 数学 2023-09-19 Xumin Jiang , Yannick Sire , Ruobing Zhang