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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

We show that assuming lower bounds on the Ricci curvature and the injectivity radius the absolute value of certain characteristic numbers of a Riemannian manifold, including all Pontryagin and Chern numbers, is bounded proportionally to the…

Differential Geometry · Mathematics 2021-05-18 Daniel Luckhardt

We establish isosystolic inequalities for a class of manifolds which includes the aspherical manifolds. In particular, we relate the systolic volume of aspherical manifolds first to their minimal entropy, then to the algebraic entropy of…

Differential Geometry · Mathematics 2007-05-23 Stephane Sabourau

We consider a compact hyperbolic antiprism. It is a convex polyhedron with $2n$ vertices in the hyperbolic space $\mathbb{H}^3$. This polyhedron has a symmetry group $S_{2n}$ generated by a mirror-rotational symmetry of order $2n$, i.e.…

Metric Geometry · Mathematics 2018-07-24 Nikolay Abrosimov , Bao Vuong

Gromov and Piatetski-Shapiro proved existence of finite volume non-arithmetic hyperbolic manifolds of any given dimension. In dimension four and higher, we show that there are about v^v such manifolds of volume at most v, considered up to…

Geometric Topology · Mathematics 2014-05-21 Tsachik Gelander , Arie Levit

We give a closed formula for volumes of generic hyperbolic tetrahedra in terms of edge lengths. The cue of our formula is by the volume conjecture for the Turaev-Viro invariant of closed 3-manifolds, which is defined from the quantum…

Metric Geometry · Mathematics 2007-05-23 Jun Murakami , Akira Ushijima

We study the problem of bounding the number of cusps of a complex hyperbolic manifold in terms of its volume. Applying algebro-geometric methods using Mumford's work on toroidal compactifications and its generalization due to N. Mok and…

Algebraic Geometry · Mathematics 2007-05-23 Jun-Muk Hwang

We define and study the renormalized volume for geometrically finite hyperbolic $3$-manifolds, including with rank-$1$ cusps. We prove a variation formula, and show that for certain families of convex co-compact hyperbolic metrics $g_\eps$…

Differential Geometry · Mathematics 2015-12-22 Colin Guillarmou , Sergiu Moroianu , Frédéric Rochon

We extend the Neumann's methods and give the explicit formulae for the volume and the Chern-Simons invariant for hyperbolic alternating knot orbifolds.

Geometric Topology · Mathematics 2018-03-06 Ji-Young Ham , Joongul Lee

We show that the existence of a nontrivial Massey product in the cohomology ring H^*(X) imposes global constraints upon the Riemannian geometry of a manifold X. Namely, we exhibit a suitable systolic inequality, associated to such a…

Differential Geometry · Mathematics 2007-05-23 Mikhail G. Katz

The main thrust of present note is a volume formula for hyperbolic surface bundle with the fundamental group G. The novelty consists in a purely algebraic approach to the above problem. Initially, we concentrate on the Baum-Connes morphism…

Geometric Topology · Mathematics 2016-09-07 Igor Nikolaev

We study the systole of a model of random hyperbolic 3-manifolds introduced by Petri and Raimbault, answering a question posed in that same article. These are compact manifolds with boundary constructed by randomly gluing truncated…

Geometric Topology · Mathematics 2024-06-18 Anna Roig-Sanchis

We show the asymptotics of the volume density function in the class of central harmonic manifolds can be specified arbitrarily and do not determine the geometry.

Differential Geometry · Mathematics 2022-06-13 Peter B. Gilkey , JeongHyeong Park

In this paper we study the systoles of arithmetic hyperbolic 2- and 3-manifolds. Our first result is the construction of infinitely many arithmetic hyperbolic 2- and 3-manifolds which are pairwise noncommensurable, all have the same…

Geometric Topology · Mathematics 2022-04-14 Laurel Heck , Benjamin Linowitz

We describe a natural strategy to enumerate compact hyperbolic 3-manifolds with geodesic boundary in increasing order of complexity. We show that the same strategy can be employed to analyze simultaneously compact manifolds and…

Geometric Topology · Mathematics 2011-01-18 Alexander Mednykh , Carlo Petronio

In arxiv:1205.1274 Rieck and Yamashita defined the link volume of 3-manifolds and studied some of its basic properties. Many of these properties are similar to the corresponding properties of the hyperbolic volume. In this paper we…

Geometric Topology · Mathematics 2012-05-15 Jair Remigio-Juárez , Yo'av Rieck

In this paper, one considers the change of orbifold Gromov-Witten invariants under weighted blow-up at smooth points. Some blow-up formula for Gromov-Witten invariants of symplectic orbifolds is proved. These results extend the results of…

Symplectic Geometry · Mathematics 2014-12-12 Weiqiang He , Jianxun Hu

In Thurston's notes, he gives two different definitions of the Gromov norm (also called simplicial volume) of a manifold and states that they are equal but does not prove it. Gromov proves it in the special case of hyperbolic manifolds as a…

Geometric Topology · Mathematics 2010-03-16 Lewis Bowen

We compute the Gromov width of homogeneous Kaehler manifolds with second Betti number equal to one. Our result is based on the recent preprint [4] and on the upper bound of the Gromov width for such manifolds obtained in [6].

Symplectic Geometry · Mathematics 2017-12-20 Andrea Loi , Fabio Zuddas

We define a geometric quantity for asymptotically hyperbolic manifolds, which we call the volume-renormalized mass. It is essentially a linear combination of the ADM mass surface integral and a renormalization of the volume. We show that…

Differential Geometry · Mathematics 2024-04-29 Mattias Dahl , Klaus Kroencke , Stephen McCormick