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In this paper we obtain new upper bounds on volumes of right-angled polyhedra in hyperbolic space $\mathbb{H}^3$ in three different cases: for ideal polyhedra with all vertices on the ideal hyperbolic boundary, for compact polytopes with…

Geometric Topology · Mathematics 2022-01-06 Stepan Alexandrov , Nikolay Bogachev , Andrei Egorov , Andrei Vesnin

In this paper an explicit formula for a lower bound on the volume of a hyperbolic orbifold, dependent on dimension and the maximal order of torsion in the orbifolds' fundamental group, is constructed.

Geometric Topology · Mathematics 2007-09-05 Ilesanmi Adeboye

In this paper we investigate the convergence for the mean curvature flow of closed submanifolds with arbitrary codimension in space forms. Particularly, we prove that the mean curvature flow deforms a closed submanifold satisfying a…

Differential Geometry · Mathematics 2011-05-31 Kefeng Liu , Hongwei Xu , Fei Ye , Entao Zhao

For a strictly pseudoconvex domain in a complex manifold we define a renormalized volume with respect to the approximately Einstein complete K\"ahler metric of Fefferman. We compute the conformal anomaly in complex dimension two and apply…

Differential Geometry · Mathematics 2011-11-10 Neil Seshadri

We give estimates of the Gromov norm of the top dimensional class in $H_c^4(\mathrm{Isom}(\mathbb{H}_{\mathbb{C}}^2);\mathbb{R})$. As a consequence, we obtain an explicit upper bound for the simplicial volume of closed oriented manifolds…

Geometric Topology · Mathematics 2019-01-01 Hester Pieters

In this paper we derive explicit estimates for the functions which appear in the previous work of Bridgeman and Kahn. As a consequence, we obtain an explicit lower bound for the length of the shortest orthogeodesic in terms of the volume of…

Geometric Topology · Mathematics 2022-09-07 Mikhail Belolipetsky , Martin Bridgeman

We give an upper bound for the growth of homology torsions of finite coverings of irreducible 3-manifolds with tori boundary in terms of hyperbolic volume.

Geometric Topology · Mathematics 2017-07-17 Thang Le

We investigate the asymptotic behavior of high-codimensional area-minimizing locally rectifiable currents in hyperbolic space, addressing a problem posed by F.H. Lin and establishing ``boundary regularity at infinity" results for such…

Differential Geometry · Mathematics 2026-01-14 Xumin Jiang , Jiongduo Xie

For a closed, strictly convex projective manifold of dimension $n\geq 3$ that admits a hyperbolic structure, we show that the ratio of Hilbert volume to hyperbolic volume is bounded below by a constant that depends only on dimension. We…

Differential Geometry · Mathematics 2017-08-17 Ilesanmi Adeboye , Harrison Bray , David Constantine

We construct combinatorial volume forms of hyperbolic three manifolds fibering over the circle. These forms define non-trivial classes in bounded cohomology. After introducing a new seminorm on exact bounded cohomology, we use these…

In this paper we describe the well studied process of renormalization of quadratic polynomials from the point of view of their natural extensions. In particular, we describe the topology of the inverse limit of infinitely renormalizable…

Dynamical Systems · Mathematics 2007-06-29 Carlos Cabrera , Tomoki Kawahira

In this note we investigate the behavior of the volume that the convex hull of two congruent and intersecting simplices in Euclidean $n$-space can have. We prove some useful equalities and inequalities on this volume. For the regular…

Metric Geometry · Mathematics 2013-05-14 Ákos G. Horváth

In this paper, we find lower bounds for volumes of hyperbolic 3-manifolds with various topological conditions. Let V_3 = 1.01494 denote the volume of a regular ideal simplex in hyperbolic 3-space. As a special case of the main theorem, if a…

Geometric Topology · Mathematics 2007-05-23 Ian Agol

This paper investigates a real-valued topological invariant of 3-manifolds called topological volume. For a given 3-manifold M it is defined as the smallest volume of the complement of a (possibly empty) hyperbolic link in M. Various…

Geometric Topology · Mathematics 2024-02-08 Marc Kegel , Arunima Ray , Jonathan Spreer , Em Thompson , Stephan Tillmann

In his paper "On the Schlafli differential equality", J. Milnor conjectured that the volume of n-dimensional hyperbolic and spherical simplices, as a function of the dihedral angles, extends continuously to the closure of the space of…

Geometric Topology · Mathematics 2007-05-23 Igor Rivin

Krasnov (arXiv: hep-th/0005106) identified the renormalized volume of a Schottky 3-manifold with the action of the Liouville theory on the conformal infiinity. We try to compute the renormalized volume in terms of more transparent geometric…

Differential Geometry · Mathematics 2007-05-23 Xiaodong Wang

Let $M$ be a Riemannian manifold with dimension greater or equal to $3$ which admits a complete, finite-volume Riemannian metric $g_0$ locally isometric to a rank-1 symmetric space of non-compact type. The volume entropy rigidity theorem…

Differential Geometry · Mathematics 2022-03-29 Yuping Ruan

We construct an explicit lower bound for the volume of a complex hyperbolic orbifold that depends only on dimension.

Geometric Topology · Mathematics 2013-11-28 Ilesanmi Adeboye , Guofang Wei

A polyhedron in a three-dimensional hyperbolic space is said to be generalized if finite, ideal and truncated vertices are admitted. In virtue of Belletti's theorem (2021) the exact upper bound for volumes of generalized hyperbolic…

Geometric Topology · Mathematics 2024-11-19 Andrey Egorov , Andrei Vesnin

In this paper we will explore fundamental constraints on the evolution of certain symplectic subvolumes possessed by any Hamiltonian phase space. This research has direct application to optimal control and control of conservative mechanical…

Optimization and Control · Mathematics 2007-09-11 Jared M. Maruskin , Daniel J. Scheeres , Anthony M. Bloch