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The hyperbolic structure on a 3-dimensional cone-manifold with a knot as singularity can often be deformed into a limiting Euclidean structure. In the present paper we show that the respective normalised Euclidean volume is always an…

Geometric Topology · Mathematics 2021-07-08 Nikolay Abrosimov , Alexander Kolpakov , Alexander Mednykh

We utilize ideal bipyramids to obtain new upper bounds on volume for hyperbolic link complements in terms of the combinatorics of their projections.

Geometric Topology · Mathematics 2015-11-10 Colin Adams

The study of rod complements is motivated by rod packing structures in crystallography. We view them as complements of links comprised of Euclidean geodesics in the 3-torus. Recent work of the second author classifies when such rod…

Geometric Topology · Mathematics 2025-09-03 Norman Do , Connie On Yu Hui , Jessica S. Purcell

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

It is conjectured that every cusped hyperbolic 3-manifold admits a geometric triangulation, i.e. it is decomposed into positive volume ideal hyperbolic tetrahedra. Here, we show that sufficiently highly twisted knots admit a geometric…

Geometric Topology · Mathematics 2023-06-14 Sophie L. Ham , Jessica S. Purcell

We give a refined upper bound for the hyperbolic volume of an alternating link in terms of the first three and the last three coefficients of its colored Jones polynomial.

Geometric Topology · Mathematics 2015-08-18 Oliver Dasbach , Anastasiia Tsvietkova

We survey some tools and techniques for determining geometric properties of a link complement from a link diagram. In particular, we survey the tools used to estimate geometric invariants in terms of basic diagrammatic link invariants. We…

Geometric Topology · Mathematics 2019-09-27 David Futer , Efstratia Kalfagianni , Jessica S. Purcell

We set forth a definition of hyperfinite knots. Loosely speaking, these are limits of certain sequences of knots with increasing crossing number. These limits exist in appropriate closures of quotient spaces of knots. We give examples of…

Geometric Topology · Mathematics 2015-06-26 Pedro Lopes

Ascending numbers are determined for 64 knots with at most n=10 crossings. After proving the theorem about the signature of alternating knot families, we distinguished all families of knots obtained from generating alternating knots with at…

Geometric Topology · Mathematics 2011-07-13 Slavik Jablan

To any prime alternating link, we associate a collection of hyperbolic right-angled ideal polyhedra by relating geometric, topological and combinatorial methods to decompose the link complement. The sum of the hyperbolic volumes of these…

Geometric Topology · Mathematics 2022-08-10 Abhijit Champanerkar , Ilya Kofman , Jessica S. Purcell

We discuss the relation between arc index, maximal Thurston--Bennequin number, and Khovanov homology for knots. As a consequence, we calculate the arc index and maximal Thurston--Bennequin number for all knots with at most 11 crossings. For…

Geometric Topology · Mathematics 2013-10-09 Lenhard Ng

We show that the proportion of hyperbolic knots among all of the prime knots of $n$ or fewer crossings does not converge to $1$ as $n$ approaches infinity. Moreover, we show that if $K$ is a nontrivial knot then the proportion of satellites…

Geometric Topology · Mathematics 2019-08-20 Yury Belousov , Andrei Malyutin

It has long been known that the quadratic term in the degree of the colored Jones polynomial of a knot is bounded above in terms of the crossing number of the knot. We show that this bound is sharp if and only if the knot is adequate. As an…

Geometric Topology · Mathematics 2023-02-14 Efstratia Kalfagianni , Christine Ruey Shan Lee

Every oriented closed geodesic on the modular surface has a canonically associated knot in its unit tangent bundle coming from the periodic orbit of the geodesic flow. We study the volume of the associated knot complement with respect to…

Geometric Topology · Mathematics 2023-08-07 José Andrés Rodríguez Migueles

We show that given n>0, there exists a hyperbolic knot K with trivial Alexander polynomial, trivial finite type invariants of order <=n, and such that the volume of the complement of K is larger than n. This contrasts with the known…

Geometric Topology · Mathematics 2014-10-01 Efstratia Kalfagianni

A triple crossing is a crossing in a projection of a knot or link that has three strands of the knot passing straight through it. A triple crossing projection is a projection such that all of the crossings are triple crossings. We prove…

Geometric Topology · Mathematics 2012-09-05 Colin Adams

We prove that the knots and links that admit a 3-highly twisted irreducible diagram with more than two twist regions are hyperbolic. This should be compared with a result of Futer-Purcell for 6-highly twisted diagrams. While their proof…

Geometric Topology · Mathematics 2025-03-12 Nir Lazarovich , Yoav Moriah , Tali Pinsky

We study near-alternating links whose diagrams satisfy conditions generalized from the notion of semi-adequate links. We extend many of the results known for adequate knots relating their colored Jones polynomials to the topology of…

Geometric Topology · Mathematics 2020-04-07 Christine Ruey Shan Lee

We study the supremum of the volume of hyperbolic polyhedra with some fixed combinatorics and with vertices of any kind (real, ideal or hyperideal). We find that the supremum is always equal to the volume of the rectification of the…

Geometric Topology · Mathematics 2020-02-10 Giulio Belletti

Symmetries of knots have been studied extensively, and strongly invertible knots are one of them. Lamm defined the equivariant crossing number $c_t(K)$, the minimum crossing number among all symmetric diagrams for a strongly invertible knot…

Geometric Topology · Mathematics 2023-04-04 Jundai Nanasawa