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Considering the Teichm\"uller space of a surface equipped with Thurston's Lipschitz metric, we study geodesic segments whose endpoints have bounded combinatorics. We show that these geodesics are cobounded, and that the closest-point…

Geometric Topology · Mathematics 2011-09-15 Anna Lenzhen , Kasra Rafi , Jing Tao

We characterize bounded and compact positive Toeplitz operators defined on the Bergman spaces over the Siegel upper half-space.

Complex Variables · Mathematics 2019-04-02 Congwen Liu , Jiajia Si

Very recently, Berinde and P\u{a}curar obtained in [V. Berinde and M. P\u{a}curar, Approximating fixed points of enriched contractions in Banach spaces. Journal of Fixed Point Theory and Applications. \textbf{22}(2) (2020), 1--10.] an…

Classical Analysis and ODEs · Mathematics 2022-09-27 Rizwan Anjum , Mujahid Abbas

Let P(S) be the space of convex projective structures on a surface S with negative Euler characteristic. Goldman and Bonahon-Dreyer constructed two different sets of global coordinates for P(S), both associated to a pair of pants…

Geometric Topology · Mathematics 2018-08-02 Francis Bonahon , Inkang Kim

The affine space of all tensor product B\'ezier patches of degree nxn with prescribed main diagonal curves is determined. First, the pair of B\'ezier curves which can be diagonals of a B\'ezier patch is characterized. Besides prescribing…

Computational Geometry · Computer Science 2024-02-07 A. Arnal , J. Monterde

We construct a hyperk\"ahler metric on twisted cotangent bundles of the complex projective space $\mathbb{CP}^n$ explicitly in terms of local coordinates. Note that the twisted cotangent bundles of $\mathbb{CP}^n$ are holomorphically…

Differential Geometry · Mathematics 2025-12-25 Takashi Hashimoto

The aim of this work is to give a twistor presentation of recent results about bi-Hermitian metrics on compact complex surfaces with odd first Betti number.

Differential Geometry · Mathematics 2014-04-18 Akira Fujiki , Massimiliano Pontecorvo

Surfaces with concentric $K$-contours and parallel $K$-contours in Euclidean $3$-space are defined. Crucial examples are presented and characterization of them are given.

Differential Geometry · Mathematics 2024-04-23 Shoichi Fujimori , Yu Kawakami , Masatoshi Kokubu

We present an example showing that a family of Riemann surfaces obtained by a general plumbing construction does not necessarily give local coordinates on the Teichmueller space.

Complex Variables · Mathematics 2008-07-13 V. Hinich

Shape matching represents a challenging problem in both information engineering and computer science, exhibiting not only a wide spectrum of multimedia applications, but also a deep relation with conformal geometry. After reviewing the…

Algebraic Geometry · Mathematics 2011-01-27 Claudio Fontanari , Letizia Pernigotti

Over the past two decades the theory of the Weil-Petersson metric has been extended to general Teichm\"uller spaces of infinite type, including for example the universal Teichm\"uller space. In this paper we give a survey of the main…

Complex Variables · Mathematics 2023-02-14 Eric Schippers , Wolfgang Staubach

We extend our discrete uniformization theorems for planar, $m$-connected, Jordan domains [Journal f\"ur die reine und angewandte Mathematik 670 (2012), 65--92] to closed surfaces of non-positive genus.

Differential Geometry · Mathematics 2015-02-04 Saar Hersonsky

A class of surfaces-graphs in a Riemannian 3-space with a prescribed projection of one field of principal directions onto a surface $\Pi$ is considered. A problem of determination of such surfaces when both principal curvatures are given…

Differential Geometry · Mathematics 2010-03-11 Vladimir Rovenski , Leonid Zelenko

We give new upper bounds on the stable commutator lengths of Dehn twists along separating curves in the mapping class group of a closed oriented surface. The estimates of these upper bounds are $O(1/g)$, where $g$ is the genus of the…

Geometric Topology · Mathematics 2016-06-29 Naoyuki Monden , Kazuya Yoshihara

The paper deals with extension of bounded bilinear maps$.$ It gives a necessary and sufficient condition for extending a bounded bilinear map on the Cartesian product of subspaces of Banach spaces$.$ This leads to a full characterization…

Functional Analysis · Mathematics 2022-08-15 C. S. Kubrusly

We prove that the every quasi-isometry of Teichm\"uller space equipped with the Teichm\"uller metric is a bounded distance from an isometry of Teichm\"uller space. That is, Teichm\"uller space is quasi-isometrically rigid.

Geometric Topology · Mathematics 2018-12-19 Alex Eskin , Howard Masur , Kasra Rafi

We consider some metrics and weak metrics defined on the Teichmueller space of a surface of finite type with nonempty boundary, that are defined using the hyperbolic length spectrum of simple closed curves and of properly embedded arcs, and…

Geometric Topology · Mathematics 2009-07-22 Lixin Liu , Athanase Papadopoulos , Weixu Su , Guillaume Théret

The coordinate transformation which maps the Kerr metric written in standard Boyer-Lindquist coordinates to its corresponding form adapted to the natural local coordinates of an observer at rest at a fixed position in the equatorial plane,…

General Relativity and Quantum Cosmology · Physics 2009-11-11 Donato Bini , Andrea Geralico , Robert T Jantzen

We consider averaged shelling and coordination numbers of aperiodic tilings. Shelling numbers count the vertices on radial shells around a vertex. Coordination numbers, in turn, count the vertices on coordination shells of a vertex, defined…

Mathematical Physics · Physics 2007-05-23 Michael Baake , Uwe Grimm

We extend the correspondence between Hessian and K\"ahler metrics and curvatures to Lagrange spaces.

Differential Geometry · Mathematics 2014-03-11 Izu Vaisman