scholarly journals Flat plumbing basket and contact structure

2021 ◽  
Vol 30 (02) ◽  
pp. 2150010
Author(s):  
Tetsuya Ito ◽  
Keiji Tagami
Keyword(s):  
Lower Bounds ◽  
Contact Structure ◽  
Seifert Surface ◽  
Open Book ◽  
Open Book Decomposition ◽  
Knots And Links ◽  
Torus Links

A flat plumbing basket is a Seifert surface consisting of a disk and bands contained in distinct pages of the disk open book decomposition of the 3-sphere. In this paper, we examine close connections between flat plumbing baskets and the contact structure supported by the open book. As an application we give lower bounds for the flat plumbing basket numbers and determine the flat plumbing basket numbers for various knots and links, including the torus links.

scholarly journals On the contact Ozsváth-Szabó invariant

2010 ◽  
Vol 47 (1) ◽  
pp. 90-107
Author(s):  
Tolga Etgü ◽  
Burak Ozbagci
Keyword(s):  
Homology Group ◽  
Contact Structure ◽  
Floer Homology ◽  
Heegaard Floer Homology ◽  
Open Book ◽  
Open Book Decomposition ◽  
Heegaard Diagram ◽  
Contact Surgery ◽  
Heegaard Floer

Sarkar and Wang proved that the hat version of Heegaard Floer homology group of a closed oriented 3-manifold is combinatorial starting from an arbitrary nice Heegaard diagram and in fact every closed oriented 3-manifold admits such a Heegaard diagram. Plamenevskaya showed that the contact Ozsváth-Szabó invariant is combinatorial once we are given an open book decomposition compatible with a contact structure. The idea is to combine the algorithm of Sarkar and Wang with the recent description of the contact Ozsváth-Szabó invariant due to Honda, Kazez and Matić. Here we observe that the hat version of the Heegaard Floer homology group and the contact Ozsváth-Szabó invariant in this group can be combinatorially calculated starting from a contact surgery diagram. We give detailed examples pointing out to some shortcuts in the computations.

scholarly journals Canonical contact unit cotangent bundle

2018 ◽  
Vol 18 (4) ◽  
pp. 405-424
Author(s):  
Takahiro Oba ◽  
Burak Ozbagci
Keyword(s):  
Cotangent Bundle ◽  
Contact Structure ◽  
Closed Surface ◽  
Open Book ◽  
Open Book Decomposition ◽  
Contact Unit

Abstract We describe an explicit open book decomposition adapted to the canonical contact structure on the unit cotangent bundle of a closed surface.

A NOTE ON OPEN BOOK EMBEDDINGS OF -MANIFOLDS IN

2021 ◽  
pp. 1-8
Author(s):  
SUHAS PANDIT ◽  
SELVAKUMAR A
Keyword(s):  
Open Book ◽  
Open Book Decomposition ◽  
Book Embeddings

Abstract In this note, we show that given a closed connected oriented $3$ -manifold M, there exists a knot K in M such that the manifold $M'$ obtained from M by performing an integer surgery admits an open book decomposition which embeds into the trivial open book of the $5$ -sphere $S^5.$

scholarly journals Finite n-quandles of torus and two-bridge links

2019 ◽  
Vol 28 (03) ◽  
pp. 1950028
Author(s):  
Alissa S. Crans ◽  
Blake Mellor ◽  
Patrick D. Shanahan ◽  
Jim Hoste
Keyword(s):  
Automorphism Groups ◽  
Cayley Graphs ◽  
Torus Knots ◽  
Knots And Links ◽  
Torus Links

We compute Cayley graphs and automorphism groups for all finite [Formula: see text]-quandles of two-bridge and torus knots and links, as well as torus links with an axis.

THE HOMFLY POLYNOMIAL FOR TORUS LINKS FROM CHERN–SIMONS GAUGE THEORY

1995 ◽  
Vol 10 (07) ◽  
pp. 1045-1089 ◽  
Author(s):  
J. M. F. LABASTIDA ◽  
M. MARIÑO
Keyword(s):  
Gauge Theory ◽  
Gauge Group ◽  
Homfly Polynomial ◽  
Fundamental Representation ◽  
Torus Knots ◽  
Polynomial Invariants ◽  
Chern Simons ◽  
Knots And Links ◽  
Torus Links

Polynomial invariants corresponding to the fundamental representation of the gauge group SU(N) are computed for arbitrary torus knots and links in the framework of Chern–Simons gauge theory making use of knot operators. As a result, a formula for the HOMFLY polynomial for arbitrary torus links is presented.

COMPLEXITY OF OPEN BOOK DECOMPOSITIONS VIA ARC COMPLEX

2010 ◽  
Vol 19 (01) ◽  
pp. 55-69 ◽  
Author(s):  
TOSHIO SAITO ◽  
RYOSUKE YAMAMOTO
Keyword(s):  
Fiber Surface ◽  
Heegaard Splitting ◽  
Open Book ◽  
Open Book Decomposition ◽  
Open Book Decompositions

Based on Hempel's distance of a Heegaard splitting, we define a certain kind of complexity of an open book decomposition, called a translation distance, by using the arc complex of its fiber surface. We then show that an open book decomposition is of translation distance at most two if it is split into "simpler" open book decompositions, or at most three if it admits a Stallings twist on it.

scholarly journals EXPLICIT HORIZONTAL OPEN BOOKS ON SOME PLUMBINGS

2006 ◽  
Vol 17 (09) ◽  
pp. 1013-1031 ◽  
Author(s):  
TOLGA ETGÜ ◽  
BURAK OZBAGCI
Keyword(s):  
Contact Structure ◽  
Complex Surface ◽  
Contact Structures ◽  
Open Book ◽  
Open Books ◽  
Tight Contact ◽  
Weinstein Conjecture ◽  
Circle Bundles ◽  
Surface Singularities

We describe explicit open books on arbitrary plumbings of oriented circle bundles over closed oriented surfaces. We show that, for a non-positive plumbing, the open book we construct is horizontal and the corresponding compatible contact structure is also horizontal and Stein fillable. In particular, on some Seifert fibered 3-manifolds we describe open books which are horizontal with respect to their plumbing description. As another application we describe horizontal open books isomorphic to Milnor open books for some complex surface singularities. Moreover we give examples of tight contact 3-manifolds supported by planar open books. As a consequence, the Weinstein conjecture holds for these tight contact structures [1].

scholarly journals Coherent band pathways between knots and links

2015 ◽  
Vol 24 (02) ◽  
pp. 1550006 ◽  
Author(s):  
Dorothy Buck ◽  
Kai Ishihara
Keyword(s):  
Lower Bounds ◽  
Recombinant Dna ◽  
Crossing Number ◽  
Dna Molecules ◽  
Minimum Number ◽  
Knots And Links

We categorize coherent band (aka nullification) pathways between knots and 2-component links. Additionally, we characterize the minimal coherent band pathways (with intermediates) between any two knots or 2-component links with small crossing number. We demonstrate these band surgeries for knots and links with small crossing number. We apply these results to place lower bounds on the minimum number of recombinant events separating DNA configurations, restrict the recombination pathways and determine chirality and/or orientation of the resulting recombinant DNA molecules.

Sign in / Sign up

Export Citation Format

Share Document