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Let $M$ be a compact oriented $3$-manifold with boundary consisting of tori, and let $G$ be a semisimple algebraic group. We define the adjoint torsion function on the moduli stack of $G$-local systems on $M$ satisfying a certain regularity…

Geometric Topology · Mathematics 2026-03-03 Tsukasa Ishibashi , Yuma Mizuno

We define a new notion of translations in the hyperbolic plane and explicitly solve the equation of the curve shortening flow. Next, we consider the class of ancient convex solutions and solve the equation of the curve shortening flow when…

Differential Geometry · Mathematics 2026-05-14 Ivan Krznarić , Rafael López

We provide a new approach to studying the moduli space of curves via Morse theory and hyperbolic geometry, by introducing a family of Morse functions on the moduli space $\overline{\mathcal{M}}_{g,n}$ of stable curves of genus $g$ with $n$…

Differential Geometry · Mathematics 2025-05-05 Changjie Chen

We study Thurston's Lipschitz and curve metrics, as well as the arc metric on the Teichmueller space of one-hold tori equipped with complete hyperbolic metrics with boundary holonomy of fixed length. We construct natural Lipschitz maps…

Geometric Topology · Mathematics 2021-04-13 Yi Huang , Athanase Papadopoulos

Let $\tau$ be an $n$-simplex and let $g$ be a metric on $\tau$ with constant curvature $\kappa$. The lengths that $g$ assigns to the edges of $\tau$, along with the value of $\kappa$, uniquely determine all of the geometry of $(\tau, g)$.…

Differential Geometry · Mathematics 2023-03-08 Andrew Clickard , Barry Minemyer

We use normal-turn estimates for McShane--Rivin norm balls to prove that, for every complete finite-area hyperbolic once-punctured torus $X$, the number of simple closed geodesics of length exactly $L\geq 2$ is at most $C_X(\log L)^2$. For…

Geometric Topology · Mathematics 2026-05-15 Nhat Minh Doan , Xiaobin Li , Van Nguyen

For a given singularity of a plane curve we consider the locus of nodal deformations of the singularity with the given number of nodes and describe possible components of the locus. As applications, we solve the local symplectic isotopy for…

Algebraic Geometry · Mathematics 2007-05-23 V. Shevchishin

Toric geometry provides a bridge between the theory of polytopes and algebraic geometry: one can associate to each lattice polytope a polarized toric variety. In this paper we explore this correspondence to classify smooth lattice polytopes…

Algebraic Geometry · Mathematics 2013-02-08 Carolina Araujo , Douglas Monsôres

We study the intersection theory of punctured pseudoholomorphic curves in $4$-dimensional symplectic cobordisms. We first study the local intersection properties of such curves at the punctures. We then use this to develop topological…

Symplectic Geometry · Mathematics 2019-03-20 Richard Siefring

This paper establishes the existence of a gap for the stable length spectrum on a hyperbolic manifold. If M is a hyperbolic n-manifold, for every positive e there is a positive d depending only on n and on e such that an element of pi_1(M)…

Geometric Topology · Mathematics 2008-04-30 Danny Calegari

We investigate the maximal number $N_h(m)$ of normally hyperbolic limit tori in three-dimensional polynomial vector fields of degree $m$, which extends the classical notion of Hilbert numbers to higher dimensions. Using recent developments…

Dynamical Systems · Mathematics 2025-07-25 Lucas Queiroz Arakaki , Luiz F. S. Gouveia , Douglas D. Novaes

We show that finitely generated mapping tori of free groups have a canonical collection of maximal sub-mapping tori of finitely generated free groups with respect to which they are relatively hyperbolic and locally relatively quasi-convex.…

Group Theory · Mathematics 2025-10-06 Marco Linton

We construct Morse homology groups associated with any regular function on a smooth complex algebraic variety, allowing singular and non-compact critical loci. These groups are generated by critical points of a certain large pertubation of…

Geometric Topology · Mathematics 2025-09-26 Aleksander Doan , Juan Muñoz-Echániz

Let M be a closed orientable irreducible 3-manifold, and let f be a diffeomorphism over M. We call an embedded 2-torus T an Anosov torus if it is invariant and the induced action of f over \pi_1(T) is hyperbolic. We prove that only few…

Dynamical Systems · Mathematics 2010-11-16 F. Rodriguez Hertz , J. Rodriguez Hertz , R. Ures

This survey may be seen as an introduction to the use of toric and tropical geometry in the analysis of plane curve singularities, which are germs $(C,o)$ of complex analytic curves contained in a smooth complex analytic surface $S$. The…

Algebraic Geometry · Mathematics 2022-07-28 Evelia R. García Barroso , Pedro D. González Pérez , Patrick Popescu-Pampu

We suggest a new approach to the study of relatively hyperbolic groups based on relative isoperimetric inequalities. Various geometric, algebraic, and algorithmic properties are discussed.

Group Theory · Mathematics 2015-01-29 D. V. Osin

We compute the asymptotics of the number of connected branched coverings of a torus as their degree goes to infinity and the ramification type stays fixed. These numbers are equal to the volumes of the moduli spaces of pairs (curve,…

Algebraic Geometry · Mathematics 2009-10-31 Alex Eskin , Andrei Okounkov

We study the energy distribution of harmonic 1-forms on a compact hyperbolic Riemann surface $S$ where a short closed geodesic is pinched. If the geodesic separates the surface into two parts, then the Jacobian torus of $S$ develops into a…

Differential Geometry · Mathematics 2019-03-29 Peter Buser , Eran Makover , Bjoern Muetzel , Robert Silhol

Recently, the existence of an Amplituhedron for tree level amplitudes in the bi-adjoint scalar field theory has been proved by Arkhani-Hamed et al. We argue that hyperbolic geometry constitutes a natural framework to address the study of…

High Energy Physics - Theory · Physics 2018-09-26 Giulio Salvatori , Sergio Cacciatori

We prove that the topological complexity $\mathrm{TC}(\pi)$ equals $\mathrm{cd}(\pi\times\pi)$ for certain toral relatively hyperbolic groups $\pi$.

Algebraic Topology · Mathematics 2021-03-01 Kevin Li