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We introduce a unified framework for counting representations of knot groups into $SU(2)$ and $SL(2, \mathbb{R})$. For a knot $K$ in the 3-sphere, Lin and others showed that a Casson-style count of $SU(2)$ representations with fixed…

几何拓扑 · 数学 2025-12-03 Nathan M. Dunfield , Jacob Rasmussen

We propose a method to compute complex volume of 2-bridge link complements. Our construction sheds light on a relationship between cluster variables with coefficients and canonical decompositions of link complements.

几何拓扑 · 数学 2014-11-19 Kazuhiro Hikami , Rei Inoue

There is a well-known correspondence between the symplectic variety of representations of the fundamental group of a punctured Riemann surface into a compact Lie group G, with fixed conjugacy classes at the punctures, and a complex variety…

辛几何 · 数学 2007-05-23 Jacques Hurtubise , Lisa C. Jeffrey

We introduce the adjoint homological Selmer module for an SL$_2$-representation of a knot group, which may be seen as a knot theoretic analogue of the dual adjoint Selmer module for a Galois representation. We then show finitely generated…

几何拓扑 · 数学 2022-09-28 Takahiro Kitayama , Masanori Morishita , Ryoto Tange , Yuji Terashima

We study the degree of polynomial representations of knots. We give the lexicographic degree of all two-bridge knots with 11 or fewer crossings. First, we estimate the total degree of a lexicographic parametrisation of such a knot. This…

几何拓扑 · 数学 2018-09-14 Erwan Brugallé , Pierre-Vincent Koseleff , Daniel Pecker

We introduce a simple combinatorial method for computing all versions of the knot Floer homology of the preimage of a two-bridge knot K(p,q) inside its double-branched cover, -L(p,q). The 4-pointed genus 1 Heegaard diagram we obtain looks…

几何拓扑 · 数学 2007-05-23 J. Elisenda Grigsby

We describe a correspondence between augmentations and certain representations of the knot group. The correspondence makes the 2-variable augmentation polynomial into a generalization of the classical $A$-polynomial. It also associates to…

几何拓扑 · 数学 2017-06-07 Christopher Cornwell

Representations of two bridge knot groups in the isometry group of some complete Riemannian 3-manifolds as $E^{3}$ (Euclidean 3-space), $H^{3}$ (hyperbolic 3-space) and $ E^{2,1}$ (Minkowski 3-space), using quaternion algebra theory, are…

几何拓扑 · 数学 2010-01-21 Hugh M. Hilden , Maria Teresa Lozano , Jose Maria Montesinos-Amilibia

The fundamental quandle is an invariant for distinguishing surface knots, yet computable presentations have traditionally been limited to surfaces embedded in the $4$-sphere. Building on the framework of banded unlink diagrams introduced by…

几何拓扑 · 数学 2026-05-15 Xiaozhou Zhou

In Part I of this article we generalize the Linearized Doubling (LD) approach, introduced in earlier work by NK, by proving a general theorem stating that if $\Sigma$ is a closed minimal surface embedded in a Riemannian three-manifold…

微分几何 · 数学 2022-12-06 Nikolaos Kapouleas , Peter McGrath

For a symplectic manifold $(M,\om)$ with exact symplectic form we construct a 2-cocycle on the group of symplectomorphisms and indicate cases when this cocycle is not trivial.

群论 · 数学 2007-07-05 Rais S. Ismagilov , Mark Losik , Peter W. Michor

We construct an integer polynomial whose coefficients enumerate the Kauffman states of the two-bridge knot with Conway's notation C(n,r).

组合数学 · 数学 2019-02-26 Franck Ramaharo

The average genus of a 2-bridge knot with crossing number $c$ approaches $\frac{c}{4} + \frac{1}{12}$ as $c$ approaches infinity, as proven by Suzuki and Tran and independently Cohen and Lowrance. In this paper, for the genera of $2$-bridge…

In this paper, we discuss the region unknotting number of different classes of 2-bridge knots. In particular, we provide region unknotting number for the classes of $2$-bridge knots whose Conway notation is $C(m,\ n), C(m,\ 2,\ m),$ $ C(m,\…

几何拓扑 · 数学 2014-07-11 Vikash Siwach , Prabhakar Madeti

We explore a knot invariant derived from colorings of corresponding $1$-tangles with arbitrary connected quandles. When the quandle is an abelian extension of a certain type the invariant is equivalent to the quandle $2$-cocycle invariant.…

几何拓扑 · 数学 2016-08-09 W. Edwin Clark , Larry A. Dunning , Masahico Saito

We introduce a new method of detecting when the fundamental group of a Dehn surgery on a knot admits a left-ordering, a method which is particularly useful for 2-bridge knots. As an illustration of this method, we show that all Dehn…

几何拓扑 · 数学 2023-07-04 Ollie Thakar

We present a new and very concrete connection between cluster algebras and knot theory. This connection is being made via continued fractions and snake graphs. It is known that the class of 2-bridge knots and links is parametrized by…

几何拓扑 · 数学 2017-11-17 Kyungyong Lee , Ralf Schiffler

We give a classification of irreducible metabelian representations from a knot group into SL(n,C) and GL(n,C). If the homology of the n-fold branched cover of the knot is finite, we show that every irreducible metabelian SL(n,C)…

几何拓扑 · 数学 2021-03-16 Hans U. Boden , Stefan Friedl

After reviewing recent results on symplectic Lefschetz pencils and symplectic branched covers of CP^2, we describe a new construction of maps from symplectic manifolds of any dimension to CP^2 and the associated monodromy invariants. We…

几何拓扑 · 数学 2007-05-23 Denis Auroux

Let $p$ be a prime number and let $K$ be a genus one two-bridge knot. In the spirit of arithmetic topology, we observe that if $p$ divides the size of the 1st homology group of some odd-th cyclic branched cover of the knot $K$, then its…

几何拓扑 · 数学 2026-01-28 Honami Sakamoto , Ryoto Tange , Jun Ueki