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We prove that the product of equators $S^{1} \times S^{1}$ in $S^{2} \times S^{2}$ is globally volume minimizing under Hamiltonian deformations.

微分几何 · 数学 2007-05-23 Hiroshi Iriyeh , Hajime Ono , Takashi Sakai

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.

几何拓扑 · 数学 2007-09-05 Ilesanmi Adeboye

Let $G$ be a free-by-cyclic group or a 2-dimensional right-angled Artin group. We provide an algebraic and a geometric characterization for when each aspherical simplicial complex with fundamental group isomorphic to $G$ has minimal volume…

群论 · 数学 2021-03-04 Corey Bregman , Matt Clay

We prove the hyperbolicity of ergodic maximal entropy measures for a class of partially hyperbolic diffeomorphisms of $\mathbb{T}^{d}$, which have a compact two-dimensional center foliation.

动力系统 · 数学 2023-06-21 Carlos F. Álvarez

We prove that if an $n$-dimensional complete minimal submanifold $M$ in hyperbolic space has sufficiently small total scalar curvature then $M$ has only one end. We also prove that for such $M$ there exist no nontrivial $L^2$ harmonic…

微分几何 · 数学 2010-02-23 Keomkyo Seo

We compute the Minimal Entropy of every closed, orientable $3$-manifold, showing that its cube equals the sum of the cubes of the minimal entropies of each hyperbolic component arising from the $JSJ$ decomposition of each prime summand. As…

微分几何 · 数学 2019-02-26 Erika Pieroni

We study a family of metrics on Euclidean space that generalize the left-invariant metric of the SOL group and the metric of the logarithmic model of Hyperbolic space. Suppose G is a connected, simply-connected, Heintze group of Abelian…

微分几何 · 数学 2024-10-15 Rene Garcia-Lara

We derive an explicit formula for the volume of a regular simplex in the hyperbolic space of any dimension.

度量几何 · 数学 2025-11-18 Zakhar Kabluchko , Philipp Schange

A new intrinsic volume metric is introduced for the class of convex bodies in $\mathbb{R}^n$. As an application, an inequality is proved for the asymptotic best approximation of the Euclidean unit ball by arbitrarily positioned polytopes…

度量几何 · 数学 2023-03-15 Florian Besau , Steven Hoehner

A classic theorem of Kazhdan and Margulis states that for any semisimple Lie group without compact factors, there is a positive lower bound on the covolume of lattices. H. C. Wang's subsequent quantitative analysis showed that the…

几何拓扑 · 数学 2018-09-25 Ilesanmi Adeboye , McKenzie Wang , Guofang Wei

We prove a volume inequality for 3-manifolds having C^0 metrics "bent" along a hypersurface, and satisfying certain curvature pinching conditions. The result makes use of Perelman's work on Ricci flow and geometrization of closed…

微分几何 · 数学 2007-11-06 Ian Agol , Nathan M. Dunfield , Peter A. Storm , William P. Thurston

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…

微分几何 · 数学 2022-03-29 Yuping Ruan

We determine the $N\to \infty$ asymptotics of the expected value of entanglement entropy in $H_{1,N}\otimes H_{2,N}$, where $H_{1,N}$ and $H_{2,N}$ are the spaces of holomorphic sections of the $N$-th tensor powers of hermitian ample line…

微分几何 · 数学 2024-11-26 Tatyana Barron , Manimugdha Saikia

We find upper and lower bounds for the first eigenvalue and the volume entropy of a noncompact real analytic K\"ahler manifold, in terms of Calabi's diastasis function and diastatic entropy, which are sharp in the case of the complex…

微分几何 · 数学 2015-02-04 Roberto Mossa

We define a notion of renormalized volume of an asymptotically hyperbolic manifold. Moreover, we prove a sharp volume comparison theorem for metrics with scalar curvature at least -6. Finally, we show that the inequality is strict unless…

微分几何 · 数学 2015-06-16 S. Brendle , O. Chodosh

We introduce the notion of relative volume entropy for two spacetimes with preferred compact spacelike foliations. This is accomplished by applying the notion of Kullback-Leibler divergence to the volume elements induced on spacelike…

广义相对论与量子宇宙学 · 物理学 2015-11-24 Nikolas Akerblom , Gunther Cornelissen

We study rigidity properties of lattices in hyperbolic n-space with n>2 and of surface groups in the context of (integrable) measure equivalence. The results for lattices in hyperbolic n-space with n>2 are generalizations of Mostow…

群论 · 数学 2012-12-13 Uri Bader , Alex Furman , Roman Sauer

We prove that the 8^4_2 link complement is the minimal volume orientable hyperbolic manifold with 4 cusps. Its volume is twice of the volume V_8 of the ideal regular octahedron, i.e. 7.32... = 2V_8. The proof relies on Agol's argument used…

几何拓扑 · 数学 2013-12-04 Ken'ichi Yoshida

Mahler's conjecture asks whether the cube is a minimizer for the volume product of a body and its polar in the class of symmetric convex bodies in a fixed dimension. It is known that every Hanner polytope has the same volume product as the…

泛函分析 · 数学 2016-11-26 Jaegil Kim

We survey the definitions and some important properties of several asymptotic invariants of smooth manifolds, and discuss some open questions related to them. We prove that the (non-)vanishing of the minimal volume is a differentiable…

微分几何 · 数学 2013-01-29 D. Kotschick